Every time I start minecraft with the api I get the error I've looked at everything and I can't figure it out. I also selected the correct versions! it comes every time the error incompatible mod set!
Kilian

It also doesn't Work with the redownload.

This was an old arch linux bug, please update zlib. (Or downgrade it). See: https://bugs.archlinux.org/task/74371

Looks like the Fabric API file got corrupted somehow (most likely during download). Re-downloading should fix your issues.

Edit: Also, please don't create issues for support questions like these, the player-support channel on Discord or GitHub discussions are better suited for helping you out with these issues