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

Question

im new in Magento 2, and i already getting annoyed with it, i made a fresh installation, and in the browser setup all looks ok, after successfully instalation on frontend and backend im getting a error, i cant login on the administration panel, when i load the admin page is giving me this error:

Refused to execute script from '<URL>' because its MIME type ('text/html') is not executable, and strict MIME type checking is enabled.

I checked online and many of the comments stated that was missing htacess, in pub/static, but everything is fine, i already clean cache, compile, deploy, etc.. I did it all, but cant understand why still i get the error...

Frontend Error:

Note: The strange thing im checking in the console error of the frontend is the error line

http://mageuniversity.local/Magento_Theme/js/responsive.js net::ERR_ABORTED 404 (Not Found)

I dont understand how the hell is looking in the root path the "Magento_Theme/js.." have no idea.

Answer 1

Static files has not been deploy , try

php bin/magento setup:static-content:deploy -f de_DE // or your language code

Also keep dev mode on it will show errors

php bin/magento deploy:mode:set developer

If still you have same issues run the following commands

rm -rf var  generated pub/static  
mkdir var generated pub/static
chmod 777 -R var generated pub

and then again

php bin/magento setup:static-content:deploy -f
php bin/magento deploy:mode:set developer