There is an error with my own function calling

There is an error when i starting to call the function. But the function is caused anyway and this message after the logging that in the function.

ERROR    API status error from OpenAI API: Error code: 400 - {'error':          
         {'message': "Invalid value for 'content': expected a string, got       
         null.", 'type': 'invalid_request_error', 'param':                      
         'messages.[3].content', 'code': None}}       

I found the error, the function call cannot return the None.

Hi @Andrew
Thanks for reaching out and for using Agno! We are glad to know that.
Please feel free to reach out incase of anymore doubts