Fatal error: Uncaught Error: Class "MailPoet\Cron\Workers\SimpleWorker" not found in /htdocs/wp-content/plugins/mailpoet/lib/Cron/Workers/KeyCheck/KeyCheckWorker.php:15
Stack trace:
#0 /htdocs/wp-content/plugins/all-in-one-seo-pack/vendor/composer/ClassLoader.php(576): include()
#1 /htdocs/wp-content/plugins/all-in-one-seo-pack/vendor/composer/ClassLoader.php(427): Composer\Autoload\{closure}('/htdocs/wp-cont...')
#2 /htdocs/wp-content/plugins/mailpoet/lib/Cron/Workers/KeyCheck/SendingServiceKeyCheck.php(17): Composer\Autoload\ClassLoader->loadClass('MailPoet\\Cron\\W...')
#3 /htdocs/wp-content/plugins/all-in-one-seo-pack/vendor/composer/ClassLoader.php(576): include('/htdocs/wp-cont...')
#4 /htdocs/wp-content/plugins/all-in-one-seo-pack/vendor/composer/ClassLoader.php(427): Composer\Autoload\{closure}('/htdocs/wp-cont...')
#5 /htdocs/wp-content/plugins/mailpoet/generated/FreeCachedContainer.php(2950): Composer\Autoload\ClassLoader->loadClass('MailPoet\\Cron\\W...')
#6 /htdocs/wp-content/plugins/mailpoet/generated/FreeCachedContainer.php(916): MailPoetGenerated\FreeCachedContainer->getSendingServiceKeyCheckService()
#7 /htdocs/wp-content/plugins/mailpoet/generated/FreeCachedContainer.php(5592): MailPoetGenerated\FreeCachedContainer->getServicesService()
#8 /htdocs/wp-content/plugins/mailpoet/generated/FreeCachedContainer.php(2612): MailPoetGenerated\FreeCachedContainer->getDotcomLicenseProvisionerService()
#9 /htdocs/wp-content/plugins/mailpoet/generated/FreeCachedContainer.php(2640): MailPoetGenerated\FreeCachedContainer->getHooks2Service()
#10 /htdocs/wp-content/plugins/mailpoet/vendor-prefixed/symfony/dependency-injection/Container.php(122): MailPoetGenerated\FreeCachedContainer->getInitializerService()
#11 /htdocs/wp-content/plugins/mailpoet/vendor-prefixed/symfony/dependency-injection/Container.php(110): MailPoetVendor\Symfony\Component\DependencyInjection\Container->make('MailPoet\\Config...', 1)
#12 /htdocs/wp-content/plugins/mailpoet/lib/DI/ContainerWrapper.php(39): MailPoetVendor\Symfony\Component\DependencyInjection\Container->get('MailPoet\\Config...')
#13 /htdocs/wp-content/plugins/mailpoet/mailpoet_initializer.php(89): MailPoet\DI\ContainerWrapper->get('MailPoet\\Config...')
#14 /htdocs/wp-content/plugins/mailpoet/mailpoet.php(194): require_once('/htdocs/wp-cont...')
#15 /htdocs/wp-settings.php(526): include_once('/htdocs/wp-cont...')
#16 /htdocs/wp-config.php(85): require_once('/htdocs/wp-sett...')
#17 /htdocs/wp-load.php(50): require_once('/htdocs/wp-conf...')
#18 /htdocs/wp-blog-header.php(13): require_once('/htdocs/wp-load...')
#19 /htdocs/index.php(17): require('/htdocs/wp-blog...')
#20 {main}
thrown in /htdocs/wp-content/plugins/mailpoet/lib/Cron/Workers/KeyCheck/KeyCheckWorker.php on line 15