Fatal error: Uncaught RuntimeException: Extension DOM is required. in /var/www/prestashop2020/vendor/symfony/symfony/src/Symfony/Component/Config/Util/XmlUtils.php:50 Stack trace: #0 /var/www/prestashop2020/vendor/symfony/symfony/src/Symfony/Component/Config/Util/XmlUtils.php(146): Symfony\Component\Config\Util\XmlUtils::parse() #1 /var/www/prestashop2020/vendor/symfony/symfony/src/Symfony/Component/DependencyInjection/Loader/XmlFileLoader.php(379): Symfony\Component\Config\Util\XmlUtils::loadFile() #2 /var/www/prestashop2020/vendor/symfony/symfony/src/Symfony/Component/DependencyInjection/Loader/XmlFileLoader.php(44): Symfony\Component\DependencyInjection\Loader\XmlFileLoader->parseFileToDOM() #3 /var/www/prestashop2020/vendor/doctrine/doctrine-cache-bundle/DependencyInjection/SymfonyBridgeAdapter.php(52): Symfony\Component\DependencyInjection\Loader\XmlFileLoader->load() #4 /var/www/prestashop2020/vendor/doctrine/doctrine-bundle/DependencyInjection/DoctrineExtension.php(61): Doctrine\Bundle\DoctrineCacheBundle\Dependenc in /var/www/prestashop2020/vendor/symfony/symfony/src/Symfony/Component/Config/Util/XmlUtils.php on line 50