Magento 2 backend MIME type ('text/html') is not executable, and strict MIME

Question

I have a fresh installation with Magento (Apache on os x). Frontend works, but backend is broken: console gives 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 have all .htacces files, I have a virtual host etc and tried re-deployed, clear cache methods etc. Nothing works.

Any idea what to do?

Psychophysiology

Answer 1

I was facing this issue on an Adobe Commerce Cloud project. Following below steps helped me to resolve the issue 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.

Steps

1. Ensure to dump app/etc/config.php from integration or staging environment where you updated your required admin configurations.

2. Then, using ece-tools package command: php ./vendor/bin/ece-tools config:dump.

3. Using scp CLI command download the remote app/etc/config.php file in your local machine.

4. Then, add this file to git, apply git commit and perform a git push.

5. Finally, deploy the latest change to integration -> staging -> production environment.

Ire