Fatal error: Uncaught Error: Interface "Sabberworm\CSS\Renderable" not found in /srv/www/htdocs/moodle/lib/php-css-parser/CSSList/CSSList.php:32 Stack trace: #0 {main} thrown in /srv/www/htdocs/moodle/lib/php-css-parser/CSSList/CSSList.php on line 32