forge 40.1.80
Rubidium mc1.18.2-0.5.4 makes it crash when loading a world
Rubidium mc1.18.2-0.5.3a is fine
if you ask for more information i will provide it

Do you believe you have provided enough information for someone not sitting at your computer and not experiencing the problem for themselves to troubleshoot the problem and figure out what is going on?

what information is needed

If you can provide any logs and debug files that generate right after the crash. minecraft versions, modpack you are using

ok il try to get some logs btw im using a custom private modpack

hmmm no longer crashes i remember updating some mods so fixed?