Fatal error: Uncaught Error: Interface 'Sabberworm\CSS\Property\AtRule' not found in /usr/home/krichard/public_html/theimpression/wp-content/plugins/perfmatters/vendor/sabberworm/php-css-parser/src/Property/CSSNamespace.php:11
Stack trace:
#0 {main}
thrown in /usr/home/krichard/public_html/theimpression/wp-content/plugins/perfmatters/vendor/sabberworm/php-css-parser/src/Property/CSSNamespace.php on line 11