laravel - retrieving rss

I try to retrieve rss from another site. I use this willvincent package for that. When I try to retrieve it I have error illegal string offset title

Controller:

$feed = Feeds::make('http://awiacja.imgw.pl/rss/metar00.php?airport=EPWA');
        $data = array(
      'title'     => $feed->get_title(),
      'permalink' => $feed->get_permalink(),
      'items'     => $feed->get_items(),
    );
        return view('home',['data' => $data]);

View:

  @foreach($data as $datum)
  <li></li>
  @endforeach

I want to retrive only info from this link :http://awiacja.imgw.pl/rss/metar00.php?airport=EPWA

via tomczas