Fatal error: Uncaught Error: Class "Symfony\Component\Security\Core\Authentication\Provider\UserAuthenticationProvider" not found in /var/www/apache/dev/cal/web/vendor/symfony/security/Core/Authentication/Provider/LdapBindAuthenticationProvider.php:31 Stack trace: #0 {main} thrown in /var/www/apache/dev/cal/web/vendor/symfony/security/Core/Authentication/Provider/LdapBindAuthenticationProvider.php on line 31