Fatal error: Uncaught Error: Class 'Magento\Framework\Setup\Declaration\Schema\Dto\GenericElement' not found in /home/esecureh/public_html/magdemo/vendor/magento/framework/Setup/Declaration/Schema/Dto/Constraint.php:12 Stack trace: #0 {main} thrown in /home/esecureh/public_html/magdemo/vendor/magento/framework/Setup/Declaration/Schema/Dto/Constraint.php on line 12