when I created a new world on 1.20, it just quit with this crash report:
crash-2023-07-18_20.18.55-client.txt

This is quite weird. Can you update Forge and see if it still crashes?

I have the same issue and updating Forge didn't seem to work. Maybe an incompability issue?

Can you try it with just CreativeCore and LittleTiles installed?

Can you figure out which mod is causing the issue? Maybe it is geophilic?

Seems like it's Optifine.
It's probably on Optifines behalf since the Create mod is also currently not compatible with Optifine.

It works as it should with only LittleTiles and CreativeCore. No crashes. So some incompability issue most likely

Can you figure out which mod is causing the issue? Maybe it is geophilic?

Can you figure out which mod is causing the issue? Maybe it is geophilic?

I'll check it out later. It probably isn't geophilic (for me at least) since I don't have it downloaded

I also created a bug report in the official Optifine github.

Oh right ... I completely forgot about this. You should not report it to Optifine. LittleTiles does not support Optifine anymore. Use Rubidium and Oculus instead. Sorry for the trouble I should have seen this earlier. I can only recommend to switch over to the alternatives.

Alright, no problem. Thanks for giving me some other alternatives. :)