Hello!
Uh, wasn't there a release today already? Well yes there was. It's just that the last update added a new security check for instance components, which sadly made Prism Launcher think that Fabric and Quilt are invalid.
Note that this issue won't cause permanent damage, as that check is done on runtime and is purely for informational purposes.
Make sure to read the previous changelog here to see the other changes as well!
Changelog
Fixed
- Fix regex pattern for component UIDs by @Scrumplex in #815
Full Changelog: 6.2...6.3