Uncaught exception 'Exception' with message 'Serialization of 'Closure' is not allowed' about laminas-developer-tools HOT 6 OPEN

return array(
    'router' => array(
        'routes' => array(
            'passport' => array(
                'type' => 'chain',
                'options' => array(
                    'routes' => array(
                        'hostname' => array(
                            'type' => 'Zend\Mvc\Router\Http\Hostname',
                            'options' => array(
                                'route' => PASSPORT_HOSTNAME,    
                                'defaults' => array(
                                    '__NAMESPACE__' => 'Passport\Controller',
                                    'controller' => 'Index',
                                    'action' => 'index',    
                                ),
                            ),    
                        ),
                        'scheme' => array(
                            'type' => 'Zend\Mvc\Router\Http\Scheme',
                            'options' => array(
                                'scheme' => 'http',
                            ),    
                        ),
                    ),
                    'route_plugins' => new RoutePluginManager(),
                ),

                'may_terminate' => true,

                'child_routes' => array(
                    'home' => array(
                        'type' => 'literal',
                        'options' => array(
                            'route' => '/',
                        ),
                    ),
                    'register' => array(
                        'type' => 'literal',
                        'options' => array(
                            'route' => '/register',
                            'defaults' => array(
                                'action' => 'register',    
                            ), 
                        ),    
                    ),
                    'login' => array(
                        'type' => 'literal',
                        'options' => array(
                            'route' => '/login',
                            'defaults' => array(
                                'action' => 'login',    
                            ),
                        ),    
                    ),
                    'logout' => array(
                        'type' => 'literal',
                        'options' => array(
                            'route' => '/logout',
                            'defaults' => array(
                                'action' => 'logout',    
                            ), 
                        ),    
                    ),
                ),
            ),
        ),    
    ),
);