Where Usherr says what went wrong, in plain words, and what to try.
In Broadcast: Server, Activity (or the Downloads tile on Server, Today).
In Classic or Neu: Activity.
Every download, and the ones that failed, with the reason.
Under a failed download, this explains the reason in plain words and what to try. The usual one: the release isn’t complete on your Usenet provider any more. Blocklist & search again tries the next release (Usherr also does it by itself).
On every film’s and show’s page, What happened lists each search, what was found and why it was turned down (“12 releases, none acceptable: 8 CAM”), each download and its end. That’s the place to look when something just doesn’t come.
Wanted lists what’s been added but isn’t here yet. Search now looks again straight away.
Often there’s simply no good release yet: Usherr keeps searching by itself. A quality profile that accepts more qualities, or a second Usenet provider, finds more.