Fatal error: Uncaught Error: Class 'Symfony\Component\Config\Util\Exception\XmlParsingException' not found in C:\xampp\htdocs\plugins\Symfony\Component\Config\Util\Exception\InvalidXmlException.php:20 Stack trace: #0 {main} thrown in C:\xampp\htdocs\plugins\Symfony\Component\Config\Util\Exception\InvalidXmlException.php on line 20