Google Search has a webpage where you can check the sitemap you produced with Django. It's not directly accessible if you don't know the steps to reach it. Please save the file sitemap.xml and submit it. This should enable you to debug your error.

The Explanation can be found here:

• https://support.google.com/webmasters/answer/7451001?hl=en

The webpage for the test of sitemaps can be found here:

• https://search.google.com/search-console/not-verified?original_url=/search-console/sitemaps