Fatal error: Uncaught Error: Class "Symfony\Component\Config\Util\Exception\XmlParsingException" not found in C:\Apache24\htdocs\cw\vendor\symfony\config\Util\Exception\InvalidXmlException.php:20 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\cw\vendor\symfony\config\Util\Exception\InvalidXmlException.php on line 20