Fatal error: Uncaught Error: Call to undefined function Symfony\Component\Security\Http\Logout\trigger_deprecation() in /home/developer/public_html/elfann.com/vendor/symfony/security-http/Logout/LogoutSuccessHandlerInterface.php:18 Stack trace: #0 {main} thrown in /home/developer/public_html/elfann.com/vendor/symfony/security-http/Logout/LogoutSuccessHandlerInterface.php on line 18