Fatal error: Uncaught Error: Class 'Zend_Validate_File_Extension' not found in /home/esecureh/public_html/magdemo/vendor/magento/framework/Validator/File/Extension.php:10 Stack trace: #0 {main} thrown in /home/esecureh/public_html/magdemo/vendor/magento/framework/Validator/File/Extension.php on line 10