This is probably outdated AUR stuff (libprotobuf comes from repo and the old AUR version of libopenshot wants the old version).
Are you updating also AUR packages?
garuda-update -a
If not working try rebuilding or reinstalling libopenshot.
Or uninstall the whole openshot, which should require libopenshot, and reinstall it after updating the system.
This is the case in my opinion: