Notice: Undefined property: DOMDocument::$documentElement in /home/h255582/public_html/vendor/symfony/symfony/src/Symfony/Component/DependencyInjection/Loader/XmlFileLoader.php on line 590

Fatal error: Uncaught Error: Call to a member function getAttributeNS() on null in /home/h255582/public_html/vendor/symfony/symfony/src/Symfony/Component/DependencyInjection/Loader/XmlFileLoader.php:590 Stack trace: #0 /home/h255582/public_html/vendor/symfony/symfony/src/Symfony/Component/Config/Util/XmlUtils.php(89): Symfony\Component\DependencyInjection\Loader\XmlFileLoader->validateSchema(Object(DOMDocument), false) #1 /home/h255582/public_html/vendor/symfony/symfony/src/Symfony/Component/Config/Util/XmlUtils.php(146): Symfony\Component\Config\Util\XmlUtils::parse('<?xml version="...', Array) #2 /home/h255582/public_html/vendor/symfony/symfony/src/Symfony/Component/DependencyInjection/Loader/XmlFileLoader.php(397): Symfony\Component\Config\Util\XmlUtils::loadFile('/home/h255582/p...', Array) #3 /home/h255582/public_html/vendor/symfony/symfony/src/Symfony/Component/DependencyInjection/Loader/XmlFileLoader.php(49): Symfony\Component\DependencyInjection\Loader\XmlFileLoader->parseFileToDOM('/home/h255582/p...') #4 /home/h in /home/h255582/public_html/vendor/symfony/symfony/src/Symfony/Component/DependencyInjection/Loader/XmlFileLoader.php on line 590