Failed to HEAD for download: Unknown 401 (401 unknown)

Additional context

I think it's worth noting that my Backblaze B2 key is configured with append-only permissions, which means the key only has permission to:

  1. listBuckets
  2. listFiles
  3. writeFiles

This did work previously, but perhaps this is a regression bug with Backblaze failing to do something it doesn't need to try to do on-upload.