libmms was approved for inclusion in Fedora recently, so the QMMP's MMS plugin can be built in Fedora now. Reproducible: Always
Please also remove the MMS plugin from qmmp-plugins-freeworld at RPM Fusion once it's built here.
FEDORA-2023-c518cacee0 has been submitted as an update to Fedora 40. https://bodhi.fedoraproject.org/updates/FEDORA-2023-c518cacee0
FEDORA-2023-c518cacee0 has been pushed to the Fedora 40 stable repository. If problem still persists, please make note of it in this bug report.