CSS not working in Django admin: The resource from [css file url] was blocked due to MIME type (“text/html”) mismatch (X-Content-Type-Options: nosniff
in case a google traveler arrives here: in my case the problem was I forgot to call to "collectstatic" after a big django upgrade in production (apache + django 3.2, from 2.2)
Bests, José.-
Django admin is displaying without CSS because of the error: 
The resource from “my-website-address/static/admin/css/responsive.css” was blocked due to MIME type (“text/html”) mismatch (X-Content-Type-Options: nosniff).
The CSS url I can open in my browser and it looks fine.
What can I do to fix CSS displaying for standard Django admin interface?