So i was creating a RLCraft server and wanted plugins in the server, but i found a error when i decided to start the server after the installing SpongeForge. it was some error abot mixins but i found a fix.
The Fix Is:
Go to the config folder in the server folder and search for rlmixins.cfg, Change Entity Tracker Desync and Outdated Chunk Data to false (aka disabled) then save.
Your server should be fixed
Goodluck!