TV show metadata not loading; previously deleting files

[mwl]

Windows Server Core, running 10.9.6 from the ZIP package.

I recently added a season to a show, and found that when I updated the library, Jellyfin (10.9.3) was deleting it shortly after adding it.  After updating to 10.9.6, it's no longer deleting the files, but it's still not adding the season to the library.  (Or, rather, it appears to be adding it then removing it again.)

Debug log: https://pastebin.com/AZkaKmS5

I had hoped that maybe the debug log might include the request and payload so I could verify whether it was a networking issue local to the box itself, but it doesn't, so I'm not really sure how to go about troubleshooting this.  Googling the exact error message ("Episode Query returned null" in quotes) yielded no results.

This is the message I think is reflecting the issue:

Code:

[2024-06-20 23:32:21.917 +01:00] [DBG] [21] Jellyfin.Plugin.Tvdb.Providers.TvdbMissingEpisodeProvider: "OnProviderManagerRefreshComplete": Try Refreshing for Item "Invincible (2021)" "MediaBrowser.Controller.Entities.TV.Series"
[2024-06-20 23:32:21.919 +01:00] [DBG] [21] Jellyfin.Plugin.Tvdb.Providers.TvdbMissingEpisodeProvider: "OnProviderManagerRefreshComplete": Refreshing Series "Invincible (2021)"
[2024-06-20 23:32:21.922 +01:00] [WRN] [21] Jellyfin.Plugin.Tvdb.Providers.TvdbMissingEpisodeProvider: Unable to get episodes from TVDB: Episode Query returned null for TVDB Id: 368207

FWIW, the full log file (without debug messages) from an earlier refresh of the entire library threw the same "Episode Query returned null" error for hundreds of other series.  Any ideas?

[TheDreadPirate]

Try removing "(2021)" from the FILE name.

Also, the Invincible folder nested under another folder? Or is it directly in the "Shows" folder that the library is pointed to. Not sure why you redacted so much of the file path.

[mwl]

AFAICT, the year being in the file names has never been a problem before, and the folder is indeed directly in the library folder, not a subfolder.

Not that any of this matters, because for some reason I can't fathom, at some point since I posted this, without any further intervention from me, the season has suddenly appeared in Jellyfin, along with an image update for another show.  ¯\_(ツ)_/¯

I'd put it down to a transient failure at TVDB but it had been failing to pick it up for a couple of days, and then it sorts itself out about half an hour after I started gathering log extracts to post here.