* @return void
     */
    public function prepareNotFoundViewModel(MvcEvent $e)
    {
        $vars = $e->getResult();
        if ($vars instanceof Response) {
            // Already have a response as the result
            return;
        }

        $response = $e->getResponse();
        if ($response->getStatusCode() != 404) {
            // Only handle 404 responses
            return;
        }

        if (! $vars instanceof ViewModel) {
            $model = new ViewModel();
            if (is_string($vars)) {
                $model->setVariable('message', $vars);
            } else {
                $model->setVariable('message', 'Page not found.');
            }
        } else {
            $model = $vars;
            if ($model->getVariable('message') === null) {
                $model->setVariable('message', 'Page not found.');
            }
        }

        $model->setTemplate($this->getNotFoundTemplate());

        // If displaying reasons, inject the reason
        $this->injectNotFoundReason($model);

        // If displaying exceptions, inject
        $this->injectException($model, $e);

        // Inject controller if we're displaying either the reason or the exception
        $this->injectController($model, $e);

        $e->setResult($model);
    }

    /**
     * Inject the not-found reason into the model
     *
     * If $displayNotFoundReason is enabled, checks to see if $reason is set,
     * and, if so, injects it into the model. If not, it injects
     * Application::ERROR_CONTROLLER_CANNOT_DISPATCH.
     *
     * @param  ViewModel $model
     * @return void
     */
    protected function injectNotFoundReason(ViewModel $model)
    {
        if (! $this->displayNotFoundReason()) {
            return;
        }

        // no route match, controller not found, or controller invalid
        if ($this->reason) {
            $model->setVariable('reason', $this->reason);
            return;
        }

        // otherwise, must be a case of the controller not being able to
        // dispatch itself.
        $model->setVariable('reason', Application::ERROR_CONTROLLER_CANNOT_DISPATCH);
    }

    /**
     * Inject the exception message into the model
     *
     * If $displayExceptions is enabled, and an exception is found in the
     * event, inject it into the model.
     *
     * @param  ViewModel $model
     * @param  MvcEvent $e
     * @return void
     */
    protected function injectException($model, $e)
    {
        if (! $this->displayExceptions()) {
            return;
        }

        $model->setVariable('display_exceptions', true);

        $exception = $e->getParam('exception', false);

        // @TODO clean up once PHP 7 requirement is enforced
        if (! $exception instanceof Exception && ! $exception instanceof Throwable) {
            return;
        }

        $model->setVariable('exception', $exception);
    }

    /**
     * Inject the controller and controller class into the model
     *
     * If either $displayExceptions or $displayNotFoundReason are enabled,
     * injects the controllerClass from the MvcEvent. It checks to see if a
     * controller is present in the MvcEvent, and, if not, grabs it from
     * the route match if present; if a controller is found, it injects it into
     * the model.
     *
     * @param  ViewModel $model
     * @param  MvcEvent $e
     * @return void
     */
    protected function injectController($model, $e)
    {
        if (! $this->displayExceptions() && ! $this->displayNotFoundReason()) {
            return;
        }

        $controller = $e->getController();
        if (empty($controller)) {
            $routeMatch = $e->getRouteMatch();
            if (empty($routeMatch)) {
                return;
            }

            $controller = $routeMatch->getParam('controller', false);
            if (! $controller) {
                return;
            }
        }

        $controllerClass = $e->getControllerClass();
        $model->setVariable('controller', $controller);
        $model->setVariable('controller_class', $controllerClass);
    }
}

     * @return void
     */
    public function prepareNotFoundViewModel(MvcEvent $e)
    {
        $vars = $e->getResult();
        if ($vars instanceof Response) {
            // Already have a response as the result
            return;
        }

        $response = $e->getResponse();
        if ($response->getStatusCode() != 404) {
            // Only handle 404 responses
            return;
        }

        if (! $vars instanceof ViewModel) {
            $model = new ViewModel();
            if (is_string($vars)) {
                $model->setVariable('message', $vars);
            } else {
                $model->setVariable('message', 'Page not found.');
            }
        } else {
            $model = $vars;
            if ($model->getVariable('message') === null) {
                $model->setVariable('message', 'Page not found.');
            }
        }

        $model->setTemplate($this->getNotFoundTemplate());

        // If displaying reasons, inject the reason
        $this->injectNotFoundReason($model);

        // If displaying exceptions, inject
        $this->injectException($model, $e);

        // Inject controller if we're displaying either the reason or the exception
        $this->injectController($model, $e);

        $e->setResult($model);
    }

    /**
     * Inject the not-found reason into the model
     *
     * If $displayNotFoundReason is enabled, checks to see if $reason is set,
     * and, if so, injects it into the model. If not, it injects
     * Application::ERROR_CONTROLLER_CANNOT_DISPATCH.
     *
     * @param  ViewModel $model
     * @return void
     */
    protected function injectNotFoundReason(ViewModel $model)
    {
        if (! $this->displayNotFoundReason()) {
            return;
        }

        // no route match, controller not found, or controller invalid
        if ($this->reason) {
            $model->setVariable('reason', $this->reason);
            return;
        }

        // otherwise, must be a case of the controller not being able to
        // dispatch itself.
        $model->setVariable('reason', Application::ERROR_CONTROLLER_CANNOT_DISPATCH);
    }

    /**
     * Inject the exception message into the model
     *
     * If $displayExceptions is enabled, and an exception is found in the
     * event, inject it into the model.
     *
     * @param  ViewModel $model
     * @param  MvcEvent $e
     * @return void
     */
    protected function injectException($model, $e)
    {
        if (! $this->displayExceptions()) {
            return;
        }

        $model->setVariable('display_exceptions', true);

        $exception = $e->getParam('exception', false);

        // @TODO clean up once PHP 7 requirement is enforced
        if (! $exception instanceof Exception && ! $exception instanceof Throwable) {
            return;
        }

        $model->setVariable('exception', $exception);
    }

    /**
     * Inject the controller and controller class into the model
     *
     * If either $displayExceptions or $displayNotFoundReason are enabled,
     * injects the controllerClass from the MvcEvent. It checks to see if a
     * controller is present in the MvcEvent, and, if not, grabs it from
     * the route match if present; if a controller is found, it injects it into
     * the model.
     *
     * @param  ViewModel $model
     * @param  MvcEvent $e
     * @return void
     */
    protected function injectController($model, $e)
    {
        if (! $this->displayExceptions() && ! $this->displayNotFoundReason()) {
            return;
        }

        $controller = $e->getController();
        if (empty($controller)) {
            $routeMatch = $e->getRouteMatch();
            if (empty($routeMatch)) {
                return;
            }

            $controller = $routeMatch->getParam('controller', false);
            if (! $controller) {
                return;
            }
        }

        $controllerClass = $e->getControllerClass();
        $model->setVariable('controller', $controller);
        $model->setVariable('controller_class', $controllerClass);
    }
}
<br />
<b>Fatal error</b>:  Uncaught Error: Class &quot;Laminas\Mvc\View\Http\RouteNotFoundStrategy&quot; not found in /home/metaseit/vendor/laminas/laminas-mvc/src/Service/HttpRouteNotFoundStrategyFactory.php:21
Stack trace:
#0 /home/metaseit/vendor/laminas/laminas-servicemanager/src/ServiceManager.php(642): Laminas\Mvc\Service\HttpRouteNotFoundStrategyFactory-&gt;__invoke(Object(Laminas\ServiceManager\ServiceManager), 'HttpRouteNotFou...', NULL)
#1 /home/metaseit/vendor/laminas/laminas-servicemanager/src/ServiceManager.php(264): Laminas\ServiceManager\ServiceManager-&gt;doCreate('HttpRouteNotFou...')
#2 /home/metaseit/vendor/laminas/laminas-mvc/src/View/Http/ViewManager.php(97): Laminas\ServiceManager\ServiceManager-&gt;get('HttpRouteNotFou...')
#3 /home/metaseit/vendor/laminas/laminas-eventmanager/src/EventManager.php(320): Laminas\Mvc\View\Http\ViewManager-&gt;onBootstrap(Object(Laminas\Mvc\MvcEvent))
#4 /home/metaseit/vendor/laminas/laminas-eventmanager/src/EventManager.php(170): Laminas\EventManager\EventManager-&gt;triggerListeners(Object(Laminas\Mvc\MvcEvent))
#5 /home/metaseit/vendor/laminas/laminas-mvc/src/Application.php(148): Laminas\EventManager\EventManager-&gt;triggerEvent(Object(Laminas\Mvc\MvcEvent))
#6 /home/metaseit/vendor/laminas/laminas-mvc/src/Application.php(260): Laminas\Mvc\Application-&gt;bootstrap(Array)
#7 /home/metaseit/public_html/schweizer-regionen.ch/index.php(30): Laminas\Mvc\Application::init(Array)
#8 {main}
  thrown in <b>/home/metaseit/vendor/laminas/laminas-mvc/src/Service/HttpRouteNotFoundStrategyFactory.php</b> on line <b>21</b><br />