Steps to Reproduce the Crash

Literally opening any type of menu, inventory, enchanting table, backpacks, even waystones.

Mod Pack URL (Optional)

No response

Mod Pack Version (Optional)

No response

Extra Notes (Optional)

It only affects me, everyone else on the server (we all use jei) is completely fine. I was also on myself for about 5 hours got off for 1hr then got back on then started crashing.

Crash Report

https://gist.github.com/That-Memer/429956f299909318828e004fee7dc3ab

Thanks for the report!
I need some more information to solve this issue, please paste your full fml-client-latest.log or latest.log to https://gist.github.com and link it here.

Apologies for having taking time out of your day but I've found the issue myself after looking through latest.log
I didn't know that was a thing so thanks for your response in helping me find a solution.
My issue was that the server (and everyone else) used an older version while mine was updated.