Fatal error: Uncaught Error: Class 'Symfony\Component\Ldap\Security\LdapUserProvider' not found in D:\workspaces\liZiPingBack\vendor\symfony\security-core\User\LdapUserProvider.php:28 Stack trace: #0 {main} thrown in D:\workspaces\liZiPingBack\vendor\symfony\security-core\User\LdapUserProvider.php on line 28