Fatal error: Uncaught Error: Interface 'Symfony\Component\CssSelector\Exception\ExceptionInterface' not found in /home/demohatinco/public_html/hat_learning_management/vendor/symfony/css-selector/Exception/ParseException.php:22 Stack trace: #0 {main} thrown in /home/demohatinco/public_html/hat_learning_management/vendor/symfony/css-selector/Exception/ParseException.php on line 22