[2018-01-12 02:00:11] main.CRITICAL: Dotmailer connector API endpoint cannot be empty. {"exception":"[object] (Magento\Framework\Exception\LocalizedException(code: 0): Dotmailer connector API endpoint cannot be empty. at /home/site/public_html/vendor/dotmailer/dotmailer-magento2-extension/Model/Apiconnector/Client.php:118)"} []

php bin/magento setup:upgrade
./n98-magerun2.phar cache:clean