latest.log

No references to any outside mods that I can see
Forge 47.1.47
Reactive 1.20.1-6a

i'm having this same issue, works fine in sp, but on a dedicated server it tries to load as client and fails to boot

Ah damn okay, sorry about that. Should be an easy enough fix

I believe 1.20.1-6b resolves this. (I was able to load onto a dedicated server with Create)
It seems that coincidentally, due to a merging issue 1.19.2-6a wasn't affected by this issue, but that was because it didn't register the crucible to the Ponder menu at all, so I'll still have to fix that...

Alright, hopefully everything is resolved here.