Feed stoped updating now can't add it

I verified the sites RSS feed is active https://www.ducati.ms/forums/-/index.rss but NewsBlur won’t let me load it. IT worked for years until this month and then stopped. Any suggestion on what I might be doing wrong?

I have the same problem using NEWSBLUR . I’ve notified the admin at guitars101 that newsblur told me they are blocking newsblur from updates. They are not answering me from guitars101. Maybe you can try.