Update app.py

app.py

@@ -69,7 +69,7 @@ class VideoArenaManager:
                     with open(self.data_file, "w") as f:
                         json.dump(data, f, indent=2)
                     return data
-        except Timeout:
+        except (Timeout, KeyError):
             print(f"Could not acquire lock on {self.data_file}")
             # Handle timeout (e.g., return default data or raise an error)
             default_rating = 1000.0