This is a bug in the notification server used by your desktop environment, which doesn't respond to the D-Bus notification submission. Hence the following lines in rhythmbox log:
(rhythmbox:1576): Rhythmbox-WARNING **: 09:58:58.256: Failed to send notification (Sub.FM): Error calling StartServiceByName for org.freedesktop.Notifications: Timeout was reached Disabling the rhythmbox notification plugin should fix the issue. This issue is handled in https://gitlab.gnome.org/GNOME/rhythmbox/-/merge_requests/100
