Fatal error: Uncaught Error: Class 'Sabberworm\CSS\Property\Selector' not found in C:\xampp\htdocs\site\wp-content\plugins\blockart-blocks\vendor\sabberworm\php-css-parser\src\Property\KeyframeSelector.php:5 Stack trace: #0 {main} thrown in C:\xampp\htdocs\site\wp-content\plugins\blockart-blocks\vendor\sabberworm\php-css-parser\src\Property\KeyframeSelector.php on line 5