The following feed is being parsed into stories allright, but the target URLs of said stories are busted:
https://www.newsblur.com/site/381817/…
It looks pretty clearly like a URL-encoding issue, and I even suspect the fault could be on their side with how they’re encoding their RSS. (the error messages indicate they’re running MS ISS, so I guess we shouldn’t expect much!)
Is there any sane amount of fixup NewsBlur could do on URLs to handle messy encoding issues? I can’t imagine this is the only site that will screw up this way.