Grief Defender

Hi, my Grief Defender give me that error in console -
https://paste.gg/p/anonymous/0070225969b041c6ae238da31bc21528

And its not working at all on the server.

full log - log (GriefDefender) · paste.gg

forge-1.12.2-14.23.5.2854.jar
spongeforge-1.12.2-2838-7.2.2-RC4024.jar
and there is another one error in console with griefdefender when server is working and online
https://paste.gg/p/anonymous/8b7a5e052114456fba6b53c872ff7e31

Upgrade LuckPerms to version 5

yeah, already upgrade it, but error is the same(
log - GriefDefender · paste.gg

It’s not the same error, but I know what’s wrong:

[23:30:28] [Server thread/INFO] [net.minecraft.server.dedicated.DedicatedServer]: Starting Nucleus version 2.0.0-S7.2-BETA-2, running on Sponge API 7.2.0-f12f8e774.

Use Nucleus 1.14.4, Nucleus v2 is not yet ready and it’s API has changed - it isn’t compatible with v1 (which is what GD uses)

YAY! Thank u very much! now all is working, and you fixed my other problems with Nucleus 1.14.4 ! thank you!
I have a last question, why when the player die, his items don’t drop? it may be due to the fact that i had Scavenger, then i delete it, but things still don’t fall out( maybe i need to delete config? or its other plugin problem?

my plugins:
Authentic-1.2.1.jar
EconomyLite (2.15.1).jar
griefdefender-1.2.6.jar
Holograms (3.1.5).jar
LuckPerms-Sponge-5.0.39.jar
NanoChat (1.4).jar
Nucleus-1.14.4-S7.1-MC1.12.2-plugin.jar
ProjectСore (0.2.1).jar
worldedit-sponge-api7.1.0-6.1.10-SNAPSHOT-dist.jar

/gamerule KeepInventory false not working

it is alright, it was problem of my permissions, i need to change my group to default, and then items will drop.