title: MappingException: "Extension DOM is required."
body: <p>I have an application, my dev environment is nginx and it works great. Production is apache, PHP7.3, mysql 5.7</p>
  
  <p>I am getting the following error:</p>
  
  <pre><code>Uncaught PHP Exception Symfony\Component\Validator\Exception\MappingException: "Extension DOM is required." at /var/www/vendor/symfony/validator/Mapping/Loader/XmlFileLoader.php line 181 {"exception":"[object] (Symfony\\Component\\Validator\\Exception\\MappingException(code: 0): Extension DOM is required. at /var/www/vendor/symfony/validator/Mapping/Loader/XmlFileLoader.php:181, LogicException(code: 0): Extension DOM is required. at /var/www/vendor/symfony/config/Util/XmlUtils.php:50)"} []
  </code></pre>
  
  <p>Everythng I read shows it should be because of php-xml (its installed), and enabled.</p>
  
  <p>Anything else I can look into?</p>