Update file_navigator.py

libs/file_navigator.py

@@ -1451,6 +1451,8 @@ class FileNavigator:
 
     def process_osz(self, dir_path: Path):
         dir_key = str(dir_path)
+        if dir_path.iterdir():
+            name = dir_path.name
             for file in dir_path.iterdir():
                 if file.name.endswith('.osu'):
                     with open(file, 'r', encoding='utf-8') as f: