Fatal error: Uncaught Error: Class 'RankMath\Helper' not found in /www/htdocs/w018f9e8/lernortgeschichte.de/wp-content/plugins/wp-rocket/inc/ThirdParty/Plugins/SEO/RankMathSEO.php:33 Stack trace: #0 /www/htdocs/w018f9e8/lernortgeschichte.de/wp-content/plugins/wp-rocket/inc/classes/event-management/class-event-manager.php(38): WP_Rocket\ThirdParty\Plugins\SEO\RankMathSEO::get_subscribed_events() #1 /www/htdocs/w018f9e8/lernortgeschichte.de/wp-content/plugins/wp-rocket/inc/Plugin.php(146): WP_Rocket\Event_Management\Event_Manager->add_subscriber(Object(WP_Rocket\ThirdParty\Plugins\SEO\RankMathSEO)) #2 /www/htdocs/w018f9e8/lernortgeschichte.de/wp-content/plugins/wp-rocket/inc/main.php(50): WP_Rocket\Plugin->load() #3 /www/htdocs/w018f9e8/lernortgeschichte.de/wp-includes/class-wp-hook.php(324): rocket_init('') #4 /www/htdocs/w018f9e8/lernortgeschichte.de/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array) #5 /www/htdocs/w018f9e8/lernortgeschichte.de/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #6 in /www/htdocs/w018f9e8/lernortgeschichte.de/wp-content/plugins/wp-rocket/inc/ThirdParty/Plugins/SEO/RankMathSEO.php on line 33