Refused to apply style from ‘https://www.example.com/wp-content/uploads/siteground-optimizer-assets/siteground-optimizer-combined-css-6429f02d4427186f5523518d5f0664b0.css’ because its MIME type (‘text/html’) is not a supported stylesheet MIME type, and strict MIME checking is enabled.

First, open your wp-config.php file and make sure any of the following constants are set to false, 0 or don’t exist at all:

define( ‘WP_DEBUG’, false );
define( ‘WP_DEBUG_LOG’, false );
define( ‘WP_DEBUG_DISPLAY’, false );
@ini_set(‘display_errors’, 0);

If any of these constants are set (e.g. define(‘WP_DEBUG’, true);) either remove the line or change true to false. This will stop WordPress from attempting to print any notices or warnings in text/html, effectively allowing OMGF to print its stylesheet in text/css again.

in Troubleshooting

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