There are a lot of Mixin errors at startup, which causes the game to crash

Crash log: https://pastebin.com/B2gYFfvY

I am also having the same issue, for some bizzare reason it only affects the first launch of my pack on the Technic launcher but the second and subsequent attempts are able to launch without the crash. It is however still very confusing for my pack users

minecraft 1.17.1
java adoptOpenJdk 16.0.1
fabric loader 0.11.7
fabric api 0.41.0
iris-and-sodium-mc1.17-1.1.2+build.9
seamless-loading-screen-1.3.6+1.17.1

latest.log

The rewrite of the mod should fix this problem