Fatal error: Uncaught Error: Class 'WP_Optimize_Page_Cache_Preloader' not found in /var/www/html/wp-content/plugins/wp-optimize/cache/class-wpo-page-cache.php:1434 Stack trace: #0 /var/www/html/wp-includes/class-wp-hook.php(324): WPO_Page_Cache->cron_schedules() #1 /var/www/html/wp-includes/plugin.php(205): WP_Hook->apply_filters() #2 /var/www/html/wp-includes/cron.php(1115): apply_filters() #3 /var/www/html/wp-includes/cron.php(1013): wp_get_schedules() #4 /var/www/html/wp-includes/class-wp-hook.php(324): _wp_cron() #5 /var/www/html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters() #6 /var/www/html/wp-includes/plugin.php(517): WP_Hook->do_action() #7 /var/www/html/wp-settings.php(717): do_action() #8 /var/www/html/wp-config.php(39): require_once('/var/www/html/w...') #9 /var/www/html/wp-load.php(50): require_once('/var/www/html/w...') #10 /var/www/html/wp-blog-header.php(13): require_once('/var/www/html/w...') #11 /var/www/html/index.php(17): require('/var/www/html/w...') #12 {main} thrown in /var/www/html/wp-content/plugins/wp-optimize/cache/class-wpo-page-cache.php on line 1434