Zend certified PHP/Magento developer

error on front end of website

I am getting this error when trying to load the homepage of the website:

a:4:{i:0;s:37:”Object DOMDocument should be created.”;i:1;s:13313:”#0 /var/www/vhosts/fakedomain.com/httpdocs/vendor/magento/framework/View/Element/UiComponent/Config/Reader.php(95): MagentoFrameworkViewElementUiComponentConfigDomMerger->getDom()

any idea whats wrong or how to get around this?