RealMetamorph

Yes. I used inventory sorting mod on client when playing on vanilla server. Since the mod was written by myself, there was a chance that the reason for the crash was in it.

Some craft recipes try load forge tags like "forge:dyes" or "forge:fences/wooden". But vanilla doesn`t known about this tags and minecraft is crashed when it uses these tags. The logs contain the following errors: It's happens only on vanilla server. I used mdk to get more detailed information about the error and to debug the client, but I only found that there are no tags when connecting to the vanilla server.