Fatal error: Uncaught Error: Class 'Magento\Ui\Block\Component\StepsWizard\StepAbstract' not found in /home/esecureh/public_html/magdemo/vendor/magento/module-configurable-product/Block/Adminhtml/Product/Steps/SelectAttributes.php:14 Stack trace: #0 {main} thrown in /home/esecureh/public_html/magdemo/vendor/magento/module-configurable-product/Block/Adminhtml/Product/Steps/SelectAttributes.php on line 14