Custom error page in laravel 5

I am  trying to set up instead of viewing the 'whoops' page, i want my users to see a custom page.
so I put this on my error page.

 if ($e instanceof \ErrorException) {
        return response()->view('errors.500', [], 500);
    } else {
        return parent::render($request, $e);
    }

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It works sometimes, but now I just got this error, still with a whoops page.

Do I need to expect a different error number

InvalidArgumentException in Carbon.php line 425:
A four digit year could not be found
Data missing

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