Attempting to run 1.17 cpm mod with optifabric will crash and show this error, "The game crashed whilst initializing game
Error: org.spongepowered.asm.mixin.transformer.throwables.MixinTransformerError: An unexpected critical error was encountered
Exit Code: -1"

crash-2021-06-21_12.40.52-client.txt

also in 1.17 mod the gui for the skin editor doesn't show.