Mod Version

-forge-1.18.1-1.3.5.12.jar

Mod Loader

Forge

Mod Loader Version

39.0.88

What happened?

I did isolate the mod (so only terrablender and Byg installed) and when i clicked singleplayer it crashed the game

crash-2022-02-26_21.53.38-client.txt

i

latest.log

latest.log

I have the same problem in 1.3.5.12 mod version and 39.1.0 forge version.

Versions 1.3.5.1 and 1.3.5.2 do not cause the problem

Also happening to me. The game flashes to a "saving world..." screen and crashes as soon as I hit the create new world button.
(Using forge mod version 1.18.1-1.3.5.12 and forge loader version 1.18.1-forge-39.0.88)

Update terrablender or reset your end biome config and let it regenerate

This also happens when trying to enter a previously-created world.