Podcast Feed Player “warning” message invalid argument for foreach()

Hello,

I used the Shortcode on a page in my site, and the podcasts displayed right away (yay!).

Unfortunately, I’m seeing the following error displayed on my podcast page:

Warning: Invalid argument supplied for foreach() in /home/customer/www/my-site-name.com/public_html/wp-content/plugins/podcast-feed-player-widget/podcast-feed-player-widget.php on line 252

This appears at the top below the main heading, and the podcasts appear underneath. The page is in Draft mode, so it’s not available to view.

Question: What does this warning message mean, how do I resolve this (fix the problem and prevent the warning from appearing on the page)?

Also — I have another heading and some <p> text above the shortcode, but it is appearing below the podcasts at the bottom of the page.

Question: What would cause the podcasts to come to the top, above other page content?

Your help is appreciated.

p.s. Is there a chance that this plugin could be made compatible with the latest WordPress?