Laravel showing page 500 instead of error

I am getting 500 page at every error below i have pasted the code for handler which i thing is the issue kindly guide.I am not getting sort of error rather then 500 page.

public function renderError(Request $request, Exception $exception) {

    if (App::environment() === 'local' || App::runningInConsole()) {
        return parent::render($request, $exception);
    }



    if (($exception instanceof NotFoundHttpException)
        || ($exception instanceof ModelNotFoundException)) {
        return response(view('errors.404'), 404);
    } elseif ($exception instanceof BadRequestHttpException) {
        return response(view('errors.400'), 400);
    } elseif ((
            ($exception instanceof HttpException)
            && ($exception->getStatusCode() === 403))
        || ($exception instanceof AccessDeniedHttpException)) {
        return response(view('errors.403'), 403);
    } elseif ($exception instanceof TooManyRequestsHttpException) {
        return response('Too many requests, please wait for a little while and try again.', 429);
    } elseif ($exception instanceof HttpResponseException) {
        return $exception->getResponse();
    } else {
        return response(view('errors.500'), 500);
    }
}

via Chebli Mohamed