HTTP error: status code 404, net::ERR_HTTP_RESPONSE_CODE_FAILURE

I'm getting this error in django using pycharmenter image description here

I'm following this tutorial " https://www.youtube.com/watch?v=OTmQOjsl0eg " at static 2 around 1:18:00 I have also shared the screenshot

DevTools failed to load SourceMap: Could not load content for http://127.0.0.1:8000/static/styles/bootstrap4/bootstrap.min.css.map: HTTP error: status code 404, net::ERR_HTTP_RESPONSE_CODE_FAILURE

Please guys help me solve this