With drivers "NVIDIA Studio" - the same error. Nothing changes(
I think this is not a forge error, but an ATM assembly. And they need to write somewhere. For example on ATM Discord
And yes, it has nothing to do with the rain actually. I have it completely disabled.
Update #1: Advice from discord
update drivers
put all particles to 0 before getting into the world
enable shaders and select a shader pack before getting into the world
went to check