Fatal error: Uncaught Error: Class "Symfony\Component\Yaml\Exception\RuntimeException" not found in /home/helpdatafirst/public_html/helpappold/vendor/symfony/yaml/Exception/ParseException.php:19 Stack trace: #0 {main} thrown in /home/helpdatafirst/public_html/helpappold/vendor/symfony/yaml/Exception/ParseException.php on line 19