Update app.py

app.py

@@ -90,7 +90,7 @@ class BasicAgent:
     def __init__(self):
         print("BasicAgent initialized.")
         self.agent = CodeAgent(
-            llm_engine=llm_engine,
+            model=llm_engine,
             tools=[web_search,python_interpreter,visit_webpage_tool,model_math_tool], 
             max_steps=1,
             verbosity_level=1,