was missing some rquirements

app.py

@@ -27,8 +27,10 @@ chat_with_tools = llm.bind_tools(tools)
 class MyAgent(TypedDict):
     messages: Annotated[list[AnyMessage], add_messages]
 
+
+class AgentWrapper:
     def __init__(self):
-        print("MyAgent initialized.")
+        print("AgentWrapper initialized.")
 
     def __call__(self, question: str) -> str:
         print(f"Agent received question (first 50 chars): {question[:50]}...")
@@ -117,7 +119,7 @@ def run_and_submit_all(profile: gr.OAuthProfile | None):
 
     # 1. Instantiate Agent ( modify this part to create your agent)
     try:
-        agent = MyAgent()
+        agent = AgentWrapper()
     except Exception as e:
         print(f"Error instantiating agent: {e}")
         return f"Error initializing agent: {e}", None

requirements.txt

@@ -3,6 +3,7 @@ requests
 langchain
 langchain-openai
 langchain-community
+langchain_huggingface
 langchain-core
 langgraph
 openai