I'm running into this problem when I try to connect to a server. Unidict and BaseMetals appear to have some problem working together. When I remove UniDict, everything works fine. There are no errors on the server side.

I have tried completely deleting the world and configs(both server and client), but still results in the client fatally missing registry entries and disconnects with a brand new world and configs.

I looked around and found this SpongePowered/SpongeForge#1897

Versions:
UniDict-1.12.2-2.9.2
BaseMetals-1.12-2.5.0-beta6.280
Forge: forge-1.12.2-14.23.5.2768-universal
SpongeForge: spongeforge-1.12.2-2768-7.1.4

client-latest.log

edit: I just came across this - #60
closing issue.