Fatal error: Uncaught Error: Class 'WP_Rocket_WP_Background_Process' not found in C:\xampp\htdocs\wp-content\plugins\wp-rocket\inc\Engine\CriticalPath\CriticalCSSGeneration.php:14 Stack trace: #0 {main} thrown in C:\xampp\htdocs\wp-content\plugins\wp-rocket\inc\Engine\CriticalPath\CriticalCSSGeneration.php on line 14