Modpack (Optional)

No response

Game log

https://pastebin.com/r9y3L0eb

Description

Beginning, for now, without providing the mod list due to its sheer size. But I have narrowed this error down to only occurring when EndlessIDs is present...which is a shame since this is the most up-to-date and comprehensive ID extender available. I can provide more logs and details on request. Mostly curious if anyone can figure out why this mod would generate a NoClassDefFoundError on S1EPacketRemoveEntityEffect since I've not found any details about this error...basically anywhere. And I'd think that an ID extender would be the least likely thing to be involved in a conflict. XD