fix plex error

app/modules/plex/plex.py

@@ -379,7 +379,10 @@ class Plex:
             file_path = item.target_path
             lib_key, path = self.__find_librarie(file_path, self._libraries)
             # 如果存在同一剧集的多集,key(path)相同会合并
-            result_dict[path.as_posix()] = lib_key
+            if path:
+                result_dict[path.as_posix()] = lib_key
+            else:
+                result_dict[""] = lib_key
         if "" in result_dict:
             # 如果有匹配失败的,刷新整个库
             self._plex.library.update()