Quilt is a new modloader (currently in beta) based on fabric. I don't think curseforge currently differentiates between the two, but compatibility isn't guaranteed, keep that in mind when using quilt mods in fabric. They had some breaking changes planned iirc.
I assume that Quilt Tags API is somehow bundled inside a quilt mod you might have accidentally included in your list. It might help to install Quilt Standard Libraries, as it should include the lifecycle events the message speaks of. Though idk if it'll be happy with the version, or work with fabric.