Warning: include(/var/www/html/wp-content/plugins/wp-rocket/inc/Engine/Saas/Admin/Subscriber.php): Failed to open stream: Cannot allocate memory in /var/www/html/wp-content/plugins/elementor/vendor/composer/ClassLoader.php on line 576

Warning: include(): Failed opening '/var/www/html/wp-content/plugins/wp-rocket/vendor/composer/../../inc/Engine/Saas/Admin/Subscriber.php' for inclusion (include_path='.:/usr/local/lib/php') in /var/www/html/wp-content/plugins/elementor/vendor/composer/ClassLoader.php on line 576

Fatal error: Uncaught TypeError: WP_Rocket\Event_Management\Event_Manager::add_subscriber(): Argument #1 ($subscriber) must be of type WP_Rocket\Event_Management\Subscriber_Interface, string given, called in /var/www/html/wp-content/plugins/wp-rocket/inc/Plugin.php on line 167 and defined in /var/www/html/wp-content/plugins/wp-rocket/inc/classes/event-management/class-event-manager.php:33
Stack trace:
#0 /var/www/html/wp-content/plugins/wp-rocket/inc/Plugin.php(167): WP_Rocket\Event_Management\Event_Manager->add_subscriber()
#1 /var/www/html/wp-content/plugins/wp-rocket/inc/main.php(70): WP_Rocket\Plugin->load()
#2 /var/www/html/wp-includes/class-wp-hook.php(353): rocket_init()
#3 /var/www/html/wp-includes/class-wp-hook.php(377): WP_Hook->apply_filters()
#4 /var/www/html/wp-includes/plugin.php(523): WP_Hook->do_action()
#5 /var/www/html/wp-settings.php(630): do_action()
#6 /var/www/html/wp-config.php(92): require_once('...')
#7 /var/www/html/wp-load.php(50): require_once('...')
#8 /var/www/html/wp-blog-header.php(13): require_once('...')
#9 /var/www/html/index.php(17): require('...')
#10 {main}
  thrown in /var/www/html/wp-content/plugins/wp-rocket/inc/classes/event-management/class-event-manager.php on line 33

Fatal error: Uncaught Error: Failed opening required '/var/www/html/.maintenance' (include_path='.:/usr/local/lib/php') in /var/www/html/wp-includes/load.php:444
Stack trace:
#0 /var/www/html/wp-includes/class-wp-fatal-error-handler.php(37): wp_is_maintenance_mode()
#1 [internal function]: WP_Fatal_Error_Handler->handle()
#2 {main}
  thrown in /var/www/html/wp-includes/load.php on line 444