frobar: Attempt to fix frobar not showing up on startup

hm/desktop/frobar/frobar/providers.py

@@ -209,8 +209,11 @@ class MprisProvider(MirrorProvider):
 
     def findCurrentPlayer(self) -> None:
         for name in [self.playerctldName] + self.manager.props.player_names:
-            # TODO Test what happens when playerctld is not available
+            try:
                 self.player = gi.repository.Playerctl.Player.new_from_name(name)
+            except gi.repository.GLib.GError:
+                # Player not found, usually playerctld during startup
+                continue
             if not self.player.props.can_play:
                 continue
             break