Facebook RSS feed not validating

I am trying to use

http://www.facebook.com/feeds/page.php?format=rss20&id=144139098944069

to get my feed from facebook. It used to work, now I am getting an error

Error: There was a problem updating facebook.com/feeds/page.php?format=rss20&id=144139098944069

when I try to update the feed and when I validate it I get all kinds of errors, yet, when I use the link in Firefox, it is a perfect feed, no problems at all.

Does anyone have any ideas on what may be wrong?

I appreciate any help or suggestions.

https://wordpress.org/plugins/feedwordpress/