account for no season/episode number

modules/plex.py

@@ -906,6 +906,7 @@ class Plex(Library):
                 missing_assets = ""
                 found_image = False
                 for season in self.query(item.seasons):
+                    if season.seasonNumber:
                         season_name = f"Season{'0' if season.seasonNumber < 10 else ''}{season.seasonNumber}"
                         if item_dir:
                             season_poster_filter = os.path.join(item_dir, f"{season_name}.*")
@@ -927,6 +928,7 @@ class Plex(Library):
                         if season_poster or season_background:
                             self.upload_images(season, poster=season_poster, background=season_background)
                     for episode in self.query(season.episodes):
+                        if episode.seasonEpisode:
                             if item_dir:
                                 episode_filter = os.path.join(item_dir, f"{episode.seasonEpisode.upper()}.*")
                             else: