After installing the mod and starting the pack to generate the config files the pack crashes. After restarting the pack without doing anything else the pack starts up fine.

Forge: 14.23.5.2838
In Control!: 3.9.16
Crashreport: https://paste.dimdev.org/ekidekewab.mccrash

Hmm that's very strange. This is working fine for everyone else. What launcher are you using?

MultiMC

I used the mod before in other multimc instances and this never occured to me before.

Almost looks as if something got corrupt. Do you see a mcjtytools instance in your mods folder? It should be downloaded automatically and put somewhere (not 100% sure where). Maybe something went wrong with that

i have. it's under /mods/memory_repo/com/github/mcjty/mcjtytools/0.0.21/ But i don't know if it was downloaded the first time i started the instance or the second time.