Error : Refused to apply style from '<URL>' because its MIME type

Refused to apply style from '<URL>' because its MIME type ('text/html') is not a supported stylesheet MIME type, and strict MIME checking is enabled

I get this error everytime I access the url directly or refresh pages that have multiple urls such as: / product /: product_id or / user / feed

but the error occurs only when I use a double url

anyone can help me? thanks ..