ConfigurationException -Laravel 5.4 ldap

Question

我正在使用 Laravel 5.4 而我已安装Adldap2-Laravel

当我尝试使用此配置连接到LDAP服务器时：

$config = [    // Mandatory Configuration Options
        'domain_controllers' => ['sampledommain.com'],
        'base_dn'            => 'dc=com,DC=sampledommain',
        'admin_username'     => 'svc-123456',
        'admin_password'     => '123456',
    ];

    // Create a new Adldap Provider instance.
    $provider = new \Adldap\Connections\Provider($config);
    $ad = new \Adldap\Adldap($config);

我收到了这个错误：

Option 0 does not exist.