A Magento website was down with following error.

Fatal error: Uncaught Error: Class ‘DOMDocument’ not found in /home/bunnytech/public_html/vendor/magento/framework/Config/Dom.php:390 Stack trace: #0 /home/bunnytech/public_html/vendor/magento/framework/Config/Dom.php(117): Magento\Framework\Config\Dom->_initDom(‘<?xml version="…')

The issue was that php xml module was not installed/enabled.

"DOM/XML" should be in enabled state while accessing the php info page.

• apache
• cPanel
• magento
• PHP