Fatal error: Uncaught Error: Interface 'Sabberworm\CSS\Property\AtRule' not found in /opt/lampp/htdocs/Insurance-Integration/vendor/sabberworm/php-css-parser/src/Property/Charset.php:19 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/Insurance-Integration/vendor/sabberworm/php-css-parser/src/Property/Charset.php on line 19