I am on Garuda Linux (Arch Linux) and I have installed Multi-MC, my favorite launcher. As of late, I have noticed that when adding a new instance, CurseForge mods won't load. Before today, I would just download the .zip from CurseForges website, and import from .zip, but now when I do that I get the error talking about it couldn't recognize something with the mod pack, I went back to try and get the error again only now for the mod pack to try and resolve it's mod ID's and that's failing. Help please. Thanks

This is due to the curseforge API change, and has nothing to do with all of fabric 5.

for now you can probably just manually download the server files and use the mods from there in a custom instance. that's what i just did and it works flawlessly :)

EDIT: Also don't forget to extract the config and kubejs stuff from the client archive you can also download from curseforge, as without those you don't really have the proper modpack configurations and you will also not be able to get to any server even your own.