Update app.py

app.py

@@ -137,7 +137,7 @@ class BasicAgent:
     def __call__(self, question: str) -> str:
         print(f"Agent received question (first 50 chars): {question[:50]}...")
         try:
-            result = agent_instance.run(question)
+            result = agent_instance.invoke(question)
             print(f"Agent response: {result[:100]}")
             return result
         except Exception as e: