This is no longer available. Someone who knows more about it than me can explain how to achieve it but I think you have to give permission to the app your building to use the feeds.
I’ve tried editing the API line in the original code to match the link above, but it still doesn’t want to play. The changes in that line where obvious, even to me.
Pity that Craig said there was no support with the code which he wrote. I could find the items he extracts in the string that is returned in the link given above, no obvious change of name for the parts either.
I’ve been out all day and just seen this. I’d edited the same line almost the same way, but didn’t touch the cache. I added the /1/, which I’d somehow missed when looking at your original post, cleared the cache, and it worked.