Mod wont run in 1.17 snapshot

Had some issues running the minecraft client in mcreator, already tried exporting and running the full game which didnt work either. Of note: This is specifically on the 1.17.1 EAP snapshot version. I can run it fine on my 1.16.5 backup.
Error message I got (some text is replaced as it contains sensitive information):

https://pastebin.com/M6tPqMUZ