[yandexmusic] Improve error handling

youtube_dl/extractor/yandexmusic.py

@@ -18,6 +18,7 @@ from ..utils import (
 class YandexMusicBaseIE(InfoExtractor):
     @staticmethod
     def _handle_error(response):
+        if isinstance(response, dict):
             error = response.get('error')
             if error:
                 raise ExtractorError(error, expected=True)