CSS Not Loading

Sometimes I face this error:

Refused to apply style from 'https://empregomais.com/wp-content/cache/min/1/3b2508e4d7040bedc56db691dd6c8468.css' because its MIME type ('text/html') is not a supported stylesheet MIME type, and strict MIME checking is enabled.

Someone can help me? I don’t understand too much of this.

The page I need help with: [log in to see the link]