protobuf seems to be required since Lutris 0.5.13 for the Battle.net integration to work correctly. See the release changelog: https://github.com/lutris/lutris/releases/tag/v0.5.13
Hello Daniel, Yeah we already got a tentative build of lutris, and it pulls the required python libraries from the setup.py, one of which being protobuf. We're waiting on the moddb library to hit stable, please do feel free to vote for it: https://bodhi.fedoraproject.org/users/bunnyapocalypse we can't really release this new version until that hits stable.
This bug appears to have been reported against 'rawhide' during the Fedora Linux 39 development cycle. Changing version to 39.