Fatal error: Uncaught Error: Class "WP_Customize_Setting" not found in C:\xampp\htdocs\canman.ee\wp-includes\customize\class-wp-customize-custom-css-setting.php:19 Stack trace: #0 {main} thrown in C:\xampp\htdocs\canman.ee\wp-includes\customize\class-wp-customize-custom-css-setting.php on line 19