Here is the crash report crash-2025-01-17_19.59.32-client.txt

I've tested Ribbits with just that Forge version and it seems to work fine, so I think it must be a mod compat issue. Would you be able to figure out which of your mods is causing the issue? Also, does this happen every time you start the game up?

Since I was just debugging what was causing a similiar crash and looked through issues on here:
I can reproduce this with [Let's Do] Farm & Charm 1.0.4 (the version included in above crashlog) (not crashing with 1.0.5), this crash also occurs with older versions of [Let's Do Addon] Apple Wood. (Also yes, happens every time the game tries to start up)

I think what's happening is that Forge (for some reason) is falsely blaming Ribbits for startup crashes caused by other mods. Try updating to Ribbits v3.0.4 and you should see a new crash message.