On web server I'm using Python3.6, Django with Gunicorn and Supervisor. After deploy to server I began to receive notifications from Sentry like this:

> 
> Message
> 
> 
> SystemExit: 1
> 
> 
> 

Sentry log: <https://sentry.io/share/issue/ddd8c6426d68494facfa0bdab9b01a2c/>

What can be reason of this?