using agent.invoke (as it is not (yet) callable)

simuGAIA.py

@@ -241,7 +241,7 @@ def run_simuGAIA_all( profile: gr.OAuthProfile | None, submit: Optional[bool] =
             continue
         try:
             if question_text.startswith("How many studio albums"):
-                submitted_answer = agent(question_text)
+                submitted_answer = agent.invoke(question_text)
                 answers_payload.append({"task_id": task_id, "submitted_answer": submitted_answer})
             results_log.append({"Task ID": task_id, "Question": question_text, "Submitted Answer": submitted_answer})
         except Exception as e: