Complete list of reasons why a css file might not be working

Question

This problem is making me feel like an absolute noob.

Here is the head of my .html file:

Answer 1

I'm using Wordpress and the stylesheet was set to enqueue to the footer

wp_enqueue_style(
        'editor-css',
        $stylesheet_directory_uri . '/assets/css/editor.css',
        ['wp-edit-blocks'],
        null,
        true   // $in_footer
    );
}

This resulted in a media="1" attribute getting added to the tag and resulted in the stylesheet being loaded but not applied.

Changed the parameter to false and its working now