Illegal State Exception-New world issues?

Hello all, 

I am trying to migrate an older 1.12.2 forge world into a new spongeforge server. I can load most mods and plugins, but I think I run into an error loading the world that I migrated over. Here is the crash report. Id appreciate if anyone is willing to help.

---- Minecraft Crash Report ----

WARNING: coremods are present:
llibrary (llibrary-core-1.0.11-1.12.2.jar)
Inventory Tweaks Coremod (InventoryTweaks-1.63.jar)
AstralCore (astralsorcery-1.12.2-1.10.19.jar)
wings (wings-1.1.5-1.12.2 (1).jar)
SpongeCoremod (spongeforge-1.12.2-2838-7.1.7-RC3910.jar)
CoreMod (Aroma1997Core-1.12.2-2.0.0.2.jar)
EnderCorePlugin (EnderCore-1.12.2-0.5.65-core.jar)
ForgelinPlugin (Forgelin-1.8.2.jar)
CTMCorePlugin (CTM-MC1.12.2-0.3.3.22.jar)
Contact their authors BEFORE contacting forge

// You should try our sister game, Minceraft!

Time: 9/7/19 10:02 AM
Description: Exception in server tick loop

java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING at line 1 column 2 path $
at com.google.gson.stream.JsonReader.beginObject(JsonReader.java:385)
at org.spongepowered.common.data.persistence.JsonDataFormat.readView(JsonDataFormat.java:106)
at org.spongepowered.common.data.persistence.JsonDataFormat.createContainer(JsonDataFormat.java:101)
at org.spongepowered.common.data.persistence.JsonDataFormat.readFrom(JsonDataFormat.java:96)
at org.spongepowered.common.data.persistence.JsonDataFormat.readFrom(JsonDataFormat.java:84)
at org.spongepowered.common.data.persistence.JsonDataFormat.read(JsonDataFormat.java:78)
at net.minecraft.world.storage.WorldInfo.getGeneratorSettings(WorldInfo.java:1405)
at net.minecraft.world.WorldServer.impl$updateWorldGenerator(WorldServer.java:3494)
at net.minecraft.world.WorldServer.handler$impl$initializeSpongeFields$zlh000(WorldServer.java:3370)
at net.minecraft.world.WorldServer.(WorldServer.java:125)
at org.spongepowered.common.world.WorldManager.createWorldFromProperties(WorldManager.java:846)
at org.spongepowered.common.world.WorldManager.loadAllWorlds(WorldManager.java:813)
at net.minecraft.server.MinecraftServer.func_71247_a(MinecraftServer.java:4397)
at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:270)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:486)
at java.lang.Thread.run(Unknown Source)

A detailed walkthrough of the error, its code path and all known details is as follows:

– Head –
Thread: Server thread
Stacktrace:
at com.google.gson.stream.JsonReader.beginObject(JsonReader.java:385)
at org.spongepowered.common.data.persistence.JsonDataFormat.readView(JsonDataFormat.java:106)
at org.spongepowered.common.data.persistence.JsonDataFormat.createContainer(JsonDataFormat.java:101)
at org.spongepowered.common.data.persistence.JsonDataFormat.readFrom(JsonDataFormat.java:96)
at org.spongepowered.common.data.persistence.JsonDataFormat.readFrom(JsonDataFormat.java:84)
at org.spongepowered.common.data.persistence.JsonDataFormat.read(JsonDataFormat.java:78)
at net.minecraft.world.storage.WorldInfo.getGeneratorSettings(WorldInfo.java:1405)
at net.minecraft.world.WorldServer.impl$updateWorldGenerator(WorldServer.java:3494)
at net.minecraft.world.WorldServer.handler$impl$initializeSpongeFields$zlh000(WorldServer.java:3370)
at net.minecraft.world.WorldServer.(WorldServer.java:125)
at org.spongepowered.common.world.WorldManager.createWorldFromProperties(WorldManager.java:846)

– Sponge PhaseTracker –
Details:
Phase Stack: [Empty stack]
Stacktrace:
at net.minecraft.server.MinecraftServer.handler$onCrashReport$zjc000(MinecraftServer.java:4721)
at net.minecraft.server.MinecraftServer.func_71230_b(MinecraftServer.java:889)
at net.minecraft.server.dedicated.DedicatedServer.func_71230_b(DedicatedServer.java:371)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:558)
at java.lang.Thread.run(Unknown Source)

– System Details –
Details:
Minecraft Version: 1.12.2
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_221, Oracle Corporation
Java VM Version: Java HotSpot™ 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 4389337112 bytes (4185 MB) / 8589934592 bytes (8192 MB) up to 8589934592 bytes (8192 MB)
JVM Flags: 13 total; -Xmx8G -Xms8G -XX:+AlwaysPreTouch -XX:+DisableExplicitGC -XX:+UseG1GC -XX:+UnlockExperimentalVMOptions -XX:MaxGCPauseMillis=45 -XX:TargetSurvivorRatio=90 -XX:G1NewSizePercent=50 -XX:G1MaxNewSizePercent=80 -XX:InitiatingHeapOccupancyPercent=10 -XX:G1MixedGCLiveThresholdPercent=50 -XX:+AggressiveOpts
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP 9.42 Powered by Forge 14.23.5.2838 87 mods loaded, 87 mods active
States: ‘U’ = Unloaded ‘L’ = Loaded ‘C’ = Constructed ‘H’ = Pre-initialized ‘I’ = Initialized ‘J’ = Post-initialized ‘A’ = Available ‘D’ = Disabled ‘E’ = Errored

Mods:

| State  | ID                                | Version                  | Source                                                      | Signature                                |
|:------ |:--------------------------------- |:------------------------ |:----------------------------------------------------------- |:---------------------------------------- |
| LCHIJA | minecraft                         | 1.12.2                   | minecraft.jar                                               | None                                     |
| LCHIJA | mcp                               | 9.42                     | minecraft.jar                                               | None                                     |
| LCHIJA | FML                               | 8.0.99.99                | forge-1.12.2-14.23.5.2838-universal.jar                     | e3c3d50c7c986df74c645c0ac54639741c90a557 |
| LCHIJA | forge                             | 14.23.5.2838             | forge-1.12.2-14.23.5.2838-universal.jar                     | e3c3d50c7c986df74c645c0ac54639741c90a557 |
| LCHIJA | spongeapi                         | 7.1.0-13da4949           | spongeforge-1.12.2-2838-7.1.7-RC3910.jar                    | None                                     |
| LCHIJA | sponge                            | 1.12.2-7.1.7-SNAPSHOT    | spongeforge-1.12.2-2838-7.1.7-RC3910.jar                    | None                                     |
| LCHIJA | spongeforge                       | 1.12.2-2838-7.1.7-RC3910 | spongeforge-1.12.2-2838-7.1.7-RC3910.jar                    | None                                     |
| LCHIJA | biomesoplenty                     | 7.0.1.2439               | BiomesOPlenty-1.12.2-7.0.1.2439-universal.jar               | None                                     |
| LCHIJA | redstoneflux                      | 2.1.0                    | RedstoneFlux-1.12-2.1.0.6-universal.jar                     | 8a6abf2cb9e141b866580d369ba6548732eff25f |
| LCHIJA | cofhcore                          | 4.6.3                    | CoFHCore-1.12.2-4.6.3.27-universal.jar                      | None                                     |
| LCHIJA | craftstudioapi                    | 1.0.0                    | CraftStudioAPI-universal-1.0.1.95-mc1.12-alpha.jar          | None                                     |
| LCHIJA | harvestcraft                      | 1.12.2zb                 | Pam's HarvestCraft 1.12.2zc The 7mm Kidney Stone Update.jar | None                                     |
| LCHIJA | baubles                           | 1.5.2                    | Baubles-1.12-1.5.2.jar                                      | None                                     |
| LCHIJA | thaumcraft                        | 6.1.BETA26               | Thaumcraft-1.12.2-6.1.BETA26.jar                            | None                                     |
| LCHIJA | twilightforest                    | 3.8.689                  | twilightforest-1.12.2-3.8.689-universal.jar                 | None                                     |
| LCHIJA | animania                          | 1.6.2                    | animania-1.12.2-1.6.2.jar                                   | None                                     |
| LCHIJA | appliedenergistics2               | rv6-stable-6             | appliedenergistics2-rv6-stable-6.jar                        | dfa4d3ac143316c6f32aa1a1beda1e34d42132e5 |
| LCHIJA | aroma1997core                     | 2.0.0.2                  | Aroma1997Core-1.12.2-2.0.0.2.jar                            | dfbfe4c473253d8c5652417689848f650b2cbe32 |
| LCHIJA | aromabackup                       | 2.1.1.4                  | AromaBackup-1.12.2-2.1.1.4.jar                              | dfbfe4c473253d8c5652417689848f650b2cbe32 |
| LCHIJA | aromabackuprecovery               | 2.1.1.4                  | AromaBackup-1.12.2-2.1.1.4.jar                              | dfbfe4c473253d8c5652417689848f650b2cbe32 |
| LCHIJA | astralsorcery                     | 1.10.19                  | astralsorcery-1.12.2-1.10.19.jar                            | a0f0b759d895c15ceb3e3bcb5f3c2db7c582edf0 |
| LCHIJA | bibliocraft                       | 2.4.5                    | BiblioCraft[v2.4.5][MC1.12.2].jar                           | None                                     |
| LCHIJA | blockcraftery                     | 1.12.2-1.3.1             | blockcraftery-1.12.2-1.3.1.jar                              | None                                     |
| LCHIJA | guideapi                          | 1.12-2.1.8-63            | Guide-API-1.12-2.1.8-63.jar                                 | None                                     |
| LCHIJA | bloodmagic                        | 1.12.2-2.4.1-103         | BloodMagic-1.12.2-2.4.1-103.jar                             | None                                     |
| LCHIJA | carryon                           | 1.12.2                   | CarryOn+MC1.12.2+v1.12.2.jar                                | 55e88f24d04398481ae6f1ce76f65fd776f14227 |
| LCHIJA | codechickenlib                    | 3.2.2.353                | CodeChickenLib-1.12.2-3.2.2.353-universal.jar               | f1850c39b2516232a2108a7bd84d1cb5df93b261 |
| LCHIJA | cofhworld                         | 1.3.1                    | CoFHWorld-1.12.2-1.3.1.7-universal.jar                      | 8a6abf2cb9e141b866580d369ba6548732eff25f |
| LCHIJA | doggytalents                      | 1.15.0.5                 | DoggyTalents-1.12.2-1.15.0.5-universal.jar                  | None                                     |
| LCHIJA | endercore                         | 1.12.2-0.5.65            | EnderCore-1.12.2-0.5.65.jar                                 | None                                     |
| LCHIJA | jei                               | 4.15.0.268               | jei_1.12.2-4.15.0.268.jar                                   | None                                     |
| LCHIJA | thermalfoundation                 | 2.6.3                    | ThermalFoundation-1.12.2-2.6.3.27-universal.jar             | 8a6abf2cb9e141b866580d369ba6548732eff25f |
| LCHIJA | thermalexpansion                  | 5.5.4                    | ThermalExpansion-1.12.2-5.5.4.43-universal.jar              | 8a6abf2cb9e141b866580d369ba6548732eff25f |
| LCHIJA | enderio                           | 5.0.50                   | EnderIO-1.12.2-5.0.50.jar                                   | None                                     |
| LCHIJA | enderiointegrationtic             | 5.0.50                   | EnderIO-1.12.2-5.0.50.jar                                   | None                                     |
| LCHIJA | enderiobase                       | 5.0.50                   | EnderIO-1.12.2-5.0.50.jar                                   | None                                     |
| LCHIJA | enderioconduits                   | 5.0.50                   | EnderIO-1.12.2-5.0.50.jar                                   | None                                     |
| LCHIJA | enderioconduitsappliedenergistics | 5.0.50                   | EnderIO-1.12.2-5.0.50.jar                                   | None                                     |
| LCHIJA | enderioconduitsopencomputers      | 5.0.50                   | EnderIO-1.12.2-5.0.50.jar                                   | None                                     |
| LCHIJA | enderioconduitsrefinedstorage     | 5.0.50                   | EnderIO-1.12.2-5.0.50.jar                                   | None                                     |
| LCHIJA | enderiointegrationforestry        | 5.0.50                   | EnderIO-1.12.2-5.0.50.jar                                   | None                                     |
| LCHIJA | mantle                            | 1.12-1.3.3.55            | Mantle-1.12-1.3.3.55.jar                                    | None                                     |
| LCHIJA | tconstruct                        | 1.12.2-2.12.0.135        | TConstruct-1.12.2-2.12.0.135.jar                            | None                                     |
| LCHIJA | enderiointegrationticlate         | 5.0.50                   | EnderIO-1.12.2-5.0.50.jar                                   | None                                     |
| LCHIJA | enderiomachines                   | 5.0.50                   | EnderIO-1.12.2-5.0.50.jar                                   | None                                     |
| LCHIJA | enderiopowertools                 | 5.0.50                   | EnderIO-1.12.2-5.0.50.jar                                   | None                                     |
| LCHIJA | extrautils2                       | 1.0                      | extrautils2-1.12-1.9.9.jar                                  | None                                     |
| LCHIJA | forgelin                          | 1.8.2                    | Forgelin-1.8.2.jar                                          | None                                     |
| LCHIJA | cfm                               | 6.3.0                    | furniture-6.3.0-1.12.2.jar                                  | None                                     |
| LCHIJA | llibrary                          | 1.7.19                   | llibrary-1.7.19-1.12.2.jar                                  | b9f30a813bee3b9dd5652c460310cfcd54f6b7ec |
| LCHIJA | iceandfire                        | 1.7.1                    | iceandfire-1.7.1-1.12.2.jar                                 | None                                     |
| LCHIJA | teslacorelib                      | 1.0.15                   | tesla-core-lib-1.12.2-1.0.15.jar                            | d476d1b22b218a10d845928d1665d45fce301b27 |
| LCHIJA | industrialforegoing               | 1.12.2-1.12.2            | industrialforegoing-1.12.2-1.12.12-236.jar                  | None                                     |
| LCHIJA | inventorytweaks                   | 1.63+release.109.220f184 | InventoryTweaks-1.63.jar                                    | 55d2cd4f5f0961410bf7b91ef6c6bf00a766dcbe |
| LCHIJA | ironbackpacks                     | 1.12.2-3.0.8-12          | IronBackpacks-1.12.2-3.0.8-12.jar                           | None                                     |
| LCHIJA | journeymap                        | 1.12.2-5.5.4             | journeymap-1.12.2-5.5.4.jar                                 | None                                     |
| LCHIJA | mcjtylib_ng                       | 3.5.3                    | mcjtylib-1.12-3.5.3.jar                                     | None                                     |
| LCHIJA | mobends                           | 0.24                     | mobends-0.24_for_MC-1.12 (1).jar                            | None                                     |
| LCHIJA | numina                            | 1.12.2-1.0.38            | Numina-1.12.2-1.0.38.jar                                    | None                                     |
| LCHIJA | powersuits                        | 1.12.2-1.0.44            | ModularPowersuits-1.12.2-1.0.44.jar                         | None                                     |
| LCHIJA | projecte                          | 1.12.2-PE1.4.1           | ProjectE-1.12.2-PE1.4.1.jar                                 | None                                     |
| LCHIJA | quickleafdecay                    | 1.2.4                    | QuickLeafDecay-MC1.12.1-1.2.4.jar                           | None                                     |
| LCHIJA | rftools                           | 7.71                     | rftools-1.12-7.71.jar                                       | None                                     |
| LCHIJA | ropebridge                        | 2.0.5                    | ropebridge-1.12-2.0.7.jar                                   | None                                     |
| LCHIJA | thermalcultivation                | 0.3.3                    | ThermalCultivation-1.12.2-0.3.3.12-universal.jar            | 8a6abf2cb9e141b866580d369ba6548732eff25f |
| LCHIJA | thermaldynamics                   | 2.5.5                    | ThermalDynamics-1.12.2-2.5.5.21-universal.jar               | 8a6abf2cb9e141b866580d369ba6548732eff25f |
| LCHIJA | thermalinnovation                 | 0.3.3                    | ThermalInnovation-1.12.2-0.3.3.12-universal.jar             | 8a6abf2cb9e141b866580d369ba6548732eff25f |
| LCHIJA | thermaltinkering                  | 1.0                      | ThermalTinkering-1.12.2-2.0.1.jar                           | None                                     |
| LCHIJA | tinkertoolleveling                | 1.12.2-1.1.0.DEV.b23e769 | TinkerToolLeveling-1.12.2-1.1.0.jar                         | None                                     |
| LCHIJA | treechopper                       | 1.2.4                    | TreeChopper-1.12.2-1.2.4.jar                                | None                                     |
| LCHIJA | veinminer                         | 0.38.2                   | VeinMiner-1.12-0.38.2.647+b31535a.jar                       | None                                     |
| LCHIJA | veinminermodsupport               | 0.38.2                   | VeinMiner-1.12-0.38.2.647+b31535a.jar                       | None                                     |
| LCHIJA | wanionlib                         | 1.12.2-2.2               | WanionLib-1.12.2-2.2.jar                                    | None                                     |
| LCHIJA | wings                             | 1.1.5                    | wings-1.1.5-1.12.2 (1).jar                                  | None                                     |
| LCHIJA | bauble_wings                      | 1.0.0                    | wings-1.1.5-1.12.2 (1).jar                                  | None                                     |
| LCHIJA | mobends_wings                     | 1.0.0                    | wings-1.1.5-1.12.2 (1).jar                                  | None                                     |
| LCHIJA | structurize                       | 1.12.2-0.10.79-ALPHA     | structurize-1.12.2-0.10.79-ALPHA.jar                        | None                                     |
| LCHIJA | minecolonies                      | 1.12.2-0.10.259-RELEASE  | minecolonies-1.12.2-0.10.259-RELEASE-universal.jar          | None                                     |
| LCHIJA | mysticallib                       | 1.12.2-1.2.1             | mysticallib-1.12.2-1.2.1.jar                                | None                                     |
| LCHIJA | teslacorelib_registries           | 1.0.15                   | tesla-core-lib-1.12.2-1.0.15.jar                            | None                                     |
| LCHIJA | unidict                           | 1.12.2-2.9.2             | UniDict-1.12.2-2.9.2.jar                                    | None                                     |


Plugins:

| State  | ID              | Version          | Source                                  | Signature |
|:------ |:--------------- |:---------------- |:--------------------------------------- |:--------- |
| LCHIJA | griefprevention | 1.12.2-4.3.0.692 | griefprevention-1.12.2-4.3.0.692.jar    | None      |
| LCHIJA | luckperms       | 4.3.75           | LuckPerms-Sponge-4.3.75.jar             | None      |
| LCHIJA | nucleus         | 1.14.0-S7.1      | Nucleus-1.14.0-S7.1-MC1.12.2-plugin.jar | None      |
| LCHIJA | pieconomy       | 0.6.2            | Pieconomy-0.6.2.jar                     | None      |
| LCHIJA | rankupper       | 4.0.4            | RankUpper-4.0.4-b20-Universal.jar       | None      |
| LCHIJA | redprotect      | 7.6.1            | RedProtect-7.6.1-b242-Universal.jar     | None      |

Loaded coremods (and transformers): 

llibrary (llibrary-core-1.0.11-1.12.2.jar)
net.ilexiconn.llibrary.server.core.plugin.LLibraryTransformer
net.ilexiconn.llibrary.server.core.patcher.LLibraryRuntimePatcher
Inventory Tweaks Coremod (InventoryTweaks-1.63.jar)
invtweaks.forge.asm.ContainerTransformer
AstralCore (astralsorcery-1.12.2-1.10.19.jar)

wings (wings-1.1.5-1.12.2 (1).jar)
me.paulf.wings.server.asm.WingsRuntimePatcher
me.paulf.wings.server.asm.mobends.WingsMoBendsRuntimePatcher
SpongeCoremod (spongeforge-1.12.2-2838-7.1.7-RC3910.jar)
org.spongepowered.common.launch.transformer.SpongeSuperclassTransformer
CoreMod (Aroma1997Core-1.12.2-2.0.0.2.jar)

EnderCorePlugin (EnderCore-1.12.2-0.5.65-core.jar)
com.enderio.core.common.transform.EnderCoreTransformer
com.enderio.core.common.transform.SimpleMixinPatcher
ForgelinPlugin (Forgelin-1.8.2.jar)

CTMCorePlugin (CTM-MC1.12.2-0.3.3.22.jar)
team.chisel.ctm.client.asm.CTMTransformer
AE2 Version: stable rv6-stable-6 for Forge 14.23.5.2768
Pulsar/tconstruct loaded Pulses:
- TinkerCommons (Enabled/Forced)
- TinkerWorld (Enabled/Not Forced)
- TinkerTools (Enabled/Not Forced)
- TinkerHarvestTools (Enabled/Forced)
- TinkerMeleeWeapons (Enabled/Forced)
- TinkerRangedWeapons (Enabled/Forced)
- TinkerModifiers (Enabled/Forced)
- TinkerSmeltery (Enabled/Not Forced)
- TinkerGadgets (Enabled/Not Forced)
- TinkerOredict (Enabled/Forced)
- TinkerIntegration (Enabled/Forced)
- TinkerFluids (Enabled/Forced)
- TinkerMaterials (Enabled/Forced)
- TinkerModelRegister (Enabled/Forced)

Ender IO: Found the following problem(s) with your installation (That does NOT mean that Ender IO caused the crash or was involved in it in any way. We add this information to help finding common problems, not as an invitation to post any crash you encounter to Ender IO's issue tracker. Always check the stack trace above to see which mod is most likely failing.):
             An unsupported base software is installed: 'sponge'. This is NOT supported.
             This may (look up the meaning of 'may' in the dictionary if you're not sure what it means) have caused the error. Try reproducing the crash WITHOUT this/these mod(s) before reporting it.

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!You are looking at the diagnostics information, not at the crash.       !!!
!!!Scroll up until you see the line with '---- Minecraft Crash Report ----'!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

AE2 Integration: IC2:OFF, RC:OFF, MFR:OFF, Waila:OFF, Mekanism:OFF, OpenComputers:OFF, THE_ONE_PROBE:OFF, TESLA:OFF, CRAFTTWEAKER:OFF
Profiler Position: N/A (disabled)
Player Count: 0 / 20; []
Is Modded: Definitely; Server brand changed to 'fml,forge,sponge'
Type: Dedicated Server (map_server.txt)

Please read this first: Common Crash Issues [PLEASE READ FIRST]

And also did you try what EnderIO suggested at the end of your crash report? Im not that familiar with sponge json loading but it looks like its attempting to load something from the world and failing (maybe a old mod)

debug

Yes ,I did read that post. Removing Enderio/endercore didnt help. There is the debug file if it helps. I also updated forge and sponge, no prevail

The recommendation that ender IO suggested was to remove sponge and see if the issue occurs? EnderIO had nothing to do with the error.

The error seems to be related to world loading, so it could be that the world needs to just migrate to the latest forge, from there add sponge back to add all your plugins.

Edit:

[09:25:47] [main/TRACE] [mixin]: Added class metadata for org/spongepowered/api/event/cause/EventContextKey to metadata cache
[09:25:47] [main/TRACE] [mixin]: Added class metadata for org/spongepowered/api/event/cause/entity/spawn/SpawnType to metadata cache
[09:25:47] [main/TRACE] [mixin]: Added class metadata for java/lang/NoClassDefFoundError to metadata cache
[09:25:47] [main/TRACE] [mixin]: Added class metadata for java/util/concurrent/ThreadFactory to metadata cache
[09:25:47] [main/TRACE] [mixin]: Added class metadata for org/spongepowered/api/item/inventory/ItemStackSnapshot to metadata cache
[09:25:47] [main/ERROR] [mixin]: Critical injection failure: LVT in net/minecraft/world/WorldServer::func_147456_g()V has incompatible changes at opcode 1010 in callback net/minecraft/world/WorldServer::handler$beforeUpdateBlocks$bbj000.
Expected: [I, Z, Z, Ljava/util/Iterator;, 
Lnet/minecraft/world/chunk/Chunk;, 
Lnet/minecraft/world/World;, I, I, 
   
[Lnet/minecraft/world/chunk/storage/ExtendedBlockStorage;, I, I, 
Lnet/minecraft/world/chunk/storage/ExtendedBlockStorage;, I, I, I, I, I, 
Lnet/minecraft/block/state/IBlockState;, 
Lnet/minecraft/block/Block;, 
Lnet/minecraft/util/math/BlockPos;, 

Lorg/spongepowered/common/bridge/block/BlockBridge;, 

Lorg/spongepowered/common/event/tracking/PhaseContext;, 
Lorg/spongepowered/common/event/tracking/IPhaseState;]
Found: [I, Z, Z, Ljava/util/Iterator;, 
Lnet/minecraft/world/chunk/Chunk;, 
Lnet/minecraft/world/World;, I, I, 

[Lnet/minecraft/world/chunk/storage/ExtendedBlockStorage;, I, I,
Lnet/minecraft/world/chunk/storage/ExtendedBlockStorage;, I, I, I, I, I,
Lnet/minecraft/block/state/IBlockState;,
Lnet/minecraft/block/Block;,
Lnet/minecraft/util/math/BlockPos;,
Lorg/spongepowered/common/bridge/block/BlockBridge;, Lco/aikar/timings/Timing;, Lnull;,
Lorg/spongepowered/common/event/tracking/PhaseContext;,
Lorg/spongepowered/common/event/tracking/IPhaseState;]

 [09:25:47] [main/INFO] [STDERR]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: org.spongepowered.asm.mixin.injection.throwables.InjectionError: LVT in net/minecraft/world/WorldServer::func_147456_g()V has incompatible changes at opcode 1010 in callback net/minecraft/world/WorldServer::handler$beforeUpdateBlocks$bbj000.

Expected: [I, Z, Z, Ljava/util/Iterator;, Lnet/minecraft/world/chunk/Chunk;, Lnet/minecraft/world/World;, I, I, 
 

[Lnet/minecraft/world/chunk/storage/ExtendedBlockStorage;, I, I, 



Lnet/minecraft/world/chunk/storage/ExtendedBlockStorage;, I, I, I, I, I, Lnet/minecraft/block/state/IBlockState;, Lnet/minecraft/block/Block;, Lnet/minecraft/util/math/BlockPos;, 

Lorg/spongepowered/common/bridge/block/BlockBridge;, 

Lorg/spongepowered/common/event/tracking/PhaseContext;, 

Lorg/spongepowered/common/event/tracking/IPhaseState;]
Found: [I, Z, Z, Ljava/util/Iterator;, 
Lnet/minecraft/world/chunk/Chunk;, 
Lnet/minecraft/world/World;, I, I, 
[Lnet/minecraft/world/chunk/storage/ExtendedBlockStorage;, I, I, 


Lnet/minecraft/world/chunk/storage/ExtendedBlockStorage;, I, I, I, I, I, Lnet/minecraft/block/state/IBlockState;, Lnet/minecraft/block/Block;, Lnet/minecraft/util/math/BlockPos;, Lorg/spongepowered/common/bridge/block/BlockBridge;, Lco/aikar/timings/Timing;, Lnull;, Lorg/spongepowered/common/event/tracking/PhaseContext;, Lorg/spongepowered/common/event/tracking/IPhaseState;]

well all my mods are for 1.12.2, so I reckon that you mean for me to update to the latest 1.12.2 version of forge (2847), which is even more new compared to the spongeforge version (2838). Anyways, I tried both. Same errors occur
debug latest
crash report latest
Lmk if you have nay ideas. ive tried multiple versions of sponge and forge, and im usually careful enough to match the forge versions. If it helps, the world was made for MC ver 12.2.2 w forge 2838. I have already tried using the latest spongeforge build for that given ver of forge

okay so all forge and sponge versions aside, spongeforge can load a world that it generates itself, but it cannot load my Forge world that was backed up with AromaBackup. Any ideas? Ive already tried changing the world to load in the server settings.

Edit: I am migrating a biomes o plenty world. Ive changed the server settings accordingly, but the startup script still fails when loading the world.

That appears to be a Sponge bug. If you send me your level.dat file, I can take a look at it.

Technical explanation: I think the IllegalStateException causing the crash is supposed to be caught by this code.

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