Skip song if track is empty.

spotdl/search/utils.py

@@ -79,17 +79,20 @@ def get_playlist_tracks(playlistUrl: str) -> List[SongObj]:
     while True:
 
         for songEntry in playlistResponse['items']:
+            if songEntry['track'] is None:
+                continue
+
             song = SongObj.from_url(
                 'https://open.spotify.com/track/' + songEntry['track']['id'])
-            
+
             if song.get_youtube_link() != None:
                 playlistTracks.append(song)
 
         # check if more tracks are to be passed        
         if playlistResponse['next']:
             playlistResponse = spotifyClient.playlist_tracks(
                 playlistUrl,
-                offset = len(playlistTracks)
+                offset = playlistResponse['offset'] + playlistResponse['limit']
             )
         else:
             break