Fatal error: Uncaught Error: Interface "Sabberworm\CSS\Property\AtRule" not found in /var/www/html/vendor/sabberworm/php-css-parser/src/Property/CSSNamespace.php:11
Stack trace:
#0 {main}
thrown in /var/www/html/vendor/sabberworm/php-css-parser/src/Property/CSSNamespace.php on line 11