Cant parse media content

I have been trying to parse media content and don't seem to be able to capture it. I can get the basics but trying to get something like the url of the image below throws an error.

<media:content url="https://static.independent.co.uk/s3fs-public/thumbnails/image/2020/03/10/14/payday-loans-5.jpg" type="image/jpeg" medium="image"/>

Example of code I'm trying.

require 'rss'

rss = RSS::Parser.parse('http://www.independent.co.uk/rss', false)

rss.items.each do |item|
  puts "#{item.title}"
  puts "#{item.media_content.url}"

end

Reproduce the failure using RSS::Parser.parse with the provided Independent RSS URL and the media:content example, then trace how that element is handled when iterating rss.items. The issue is done when the media content can be parsed without the reported error and its URL can be accessed as shown.