Fatal error: Uncaught Error: Class 'Magento\Framework\Message\AbstractMessage' not found in /home/esecureh/public_html/magdemo/vendor/magento/framework/Message/Test/Unit/TestingMessage.php:12 Stack trace: #0 {main} thrown in /home/esecureh/public_html/magdemo/vendor/magento/framework/Message/Test/Unit/TestingMessage.php on line 12