Fatal error: Uncaught Error: Class "Wikimedia\CSS\Sanitizer\RuleSanitizer" not found in /var/www/html/w/vendor/wikimedia/css-sanitizer/src/Sanitizer/MediaAtRuleSanitizer.php:19 Stack trace: #0 {main} thrown in /var/www/html/w/vendor/wikimedia/css-sanitizer/src/Sanitizer/MediaAtRuleSanitizer.php on line 19