Fatal error: Uncaught Error: Class "Symfony\Component\Security\Http\Firewall\AbstractListener" not found in /var/www/crm_killing_ninja/vendor/symfony/security-http/Firewall/SwitchUserListener.php:41 Stack trace: #0 {main} thrown in /var/www/crm_killing_ninja/vendor/symfony/security-http/Firewall/SwitchUserListener.php on line 41