Getting this crash when trying to join Multiplayer server, works fine on Singleplayer
https://pastebin.com/w0CrRdbn

At first glance, looks like it may be that I need to access the biome's registry name through methods specific to the client world rather than the way it's normally done during worldgen. I'll fix this later today

Crash is hotfixed. Biome titles are currently broken on multiplayer servers - I'll revisit it later today when I have some more time.

Should be fixed in v1.2.2. Let me know if it works for you

Tested my self and seems to work. Closing for now