this is the error i get, i dont have any shaders activated
The game crashed whilst unexpected error
Error: java.lang.NullPointerException: Cannot invoke "net.minecraft.class_5944.setSampler(int, Object)" because "shaderinstance" is null
mc 1.20.1 fabric API 0.85.0 optifine 20.1_HD_U_I5 optifabric-1.13.25

I have the same issue. No fix for me so far. Have you had any luck fixing it?

I too have a very similar issue, let's see if someone fixes it

Same issue here, while joining a Server it crashes