Stylesheet errors

There is another topic similar to this, but it is marked Resolved. The issue still exists, so it is not resolved.

The resource from “/wp-content/plugins/popup-maker/dist/packages/block-library-style.css?ver=7424eb959f91acb8bbb2” was blocked due to MIME type (“text/html”) mismatch (X-Content-Type-Options: nosniff). 2 post.php
The resource from “/wp-content/plugins/popup-maker/dist/packages/block-library-style.css?ver=7424eb959f91acb8bbb2” was blocked due to MIME type (“text/html”) mismatch (X-Content-Type-Options: nosniff).