Update app.py

app.py

@@ -41,7 +41,7 @@ def audio_separation():
     	}
     	return result
     except Exception as e:
-        result = "Error: " + str(e), 500
+        return "Error: " + str(e), 500
 
 @app.route('/download/<filename>', methods=['GET'])
 def download(filename):