Undefined property: SimplePie::$channel

Hi,

I love the plugin, but when I install this show up:

Notice: Undefined property: SimplePie::$channel in /home4/univ0827/matheustomoto.com.br/wp-content/plugins/podcast-feed-player-widget/podcast-feed-player-widget.php on line 64

This is what we have and the line 64:

if ( ! is_wp_error( $feed ) ) :
$maxitems = $feed->get_item_quantity( $quantity );
$feed_items = $feed->get_items( 0, $maxitems );
$channel = $feed->channel;
endif;

The page I need help with: [log in to see the link]