JSONDecodeError: Expecting value: line 1 column 1 (char 0)

Hello, I am currently in the production environment. I have a problem when I do GET requests, the response from the server is <Response [414]> and in the console json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0).

This only happens to me when I make large requests and I have tried increasing the number of gunicorns workers and the timeout but without effect. How to increase number of gunicorns workers

If anyone has a suggestion it is welcome. thank you