Fatal error: Uncaught Error: Class "WPMailSMTP\Tasks\Task" not found in /var/www/html/wp-content/plugins/wp-mail-smtp-pro/src/Tasks/Queue/CleanupQueueTask.php:16 Stack trace: #0 {main} thrown in /var/www/html/wp-content/plugins/wp-mail-smtp-pro/src/Tasks/Queue/CleanupQueueTask.php on line 16