Requesting pointers to debugging a particular RSS

[ahmogit]

Been using the attached ancient version of jquery.rss.js along with a local version of feedrapp for quite some time, without issue.
However, I just added a jquery() clause to my init.js pointing to this RSS URL

  https://www.boulderodm.gov/posts/feed

and am now consistently seeing the console error emitted on line 26.

Fwiw: The above URL passes the w3.org RSS validator

 https://validator.w3.org/feed/

without error.

Any suggestions on how to go about debugging this? I would prefer to avoid upgrading to the latest/greatest jquery.rss, if the cause of this is something simple that I can locally patch easily.

Thanks!

old_jquery.rss.js.txt