it's with a bunch of other mods, so this is probably a compatibility issue (which i'm going to see if i can sort out on my own). still, i thought i'd send a crash report just in case.
crash-2021-08-08_23.35.34-fml.txt
this issue happens every time i try to launch my game.
-UPDATE-
i deleted and reinstalled all my mods (and launched the pack from the curseforge/twitch launcher) and it works great now