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Angular - Refused to apply style from because its MIME type ('') is not a supported stylesheet MIME type

I t has been a while since the last time I did some web development using Angular. Today I had to troubleshoot an existing application, so I compiled the Angular code and opened my browser for a debugging session.

First thing I noticed however was that although the Javascript code was executed succesfully, no CSS styling was applied.

When I had a look at the browser errors I noticed the following error message:

Refused to apply style from 'https://localhost:3000/assets/styles/style.css' because its MIME type ('') is not a supported stylesheet MIME type, and strict MIME checking is enabled.

Whoops! That was an error message that didn’t ring a bell.

The error turned out to be more scary than the root cause of the issue. It turned out that the path to the CSS file was incorrect and that a 404 response was returned from the server. 

I fixed the path and could happily continue debugging…

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