fix bug

app/actions/fetch_medias.py

@@ -34,6 +34,8 @@ class FetchMediasAction(BaseAction):
     def __init__(self, action_id: str):
         super().__init__(action_id)
 
+        self._medias = []
+        self._has_error = False
         self.__inner_sources = [
             {
                 "func": RecommendChain().tmdb_trending,