fix : none generator error

server/app.py

@@ -49,7 +49,9 @@ def setup():
 
 @app.route('/get_updated_sentence')
 def get_updated_sentence():
-    return jsonify(generator.get_status())
+    if not generator:
+        return jsonify({"error": "Generator not initialized"}), 400
+    return generator.get_status()
 
 if __name__ == '__main__':
     app.run(host='0.0.0.0', threaded=True, debug=True, port=args.port)