hello i got this error while loading minecraft forge server with FTB quests mod: -- MOD ftbquests --
Details:
Mod File: ftb-quests-forge-1605.3.5-build.69.jar
Failure message: FTB Quests (ftbquests) encountered an error during the load_registries event phase
java.lang.IllegalAccessError: Update to non-static final field net.minecraft.item.Item.field_77700_c attempted from a different method (setCraftingRemainingItemFTBL) than the initializer method
Mod Version: 1605.3.5-build.69
Mod Issue URL: https://github.com/FTBTeam/FTB-Quests/issues
Exception message: java.lang.IllegalAccessError: Update to non-static final field net.minecraft.item.Item.field_77700_c attempted from a different method (setCraftingRemainingItemFTBL) than the initializer method

It looks like its conflicting with another mod. Which ones have you added to the pack?

Closing this issue since it's caused by something he's trying to add and not inherent to the pack, and he hasn't gotten back to you in months after you asked for more information.