🐛 System.InvalidOperationException: Each parameter in the deserialization constructor

[PartTheSeas]

Description

I'm sorry if this doesn't belong here because I'm on the unstable Branch of Jellyfin (v11.12.0). So if that is the case and there's no support for it please stop reading right here.

If not, the issue is that I can't seem to update metadata on Fludder with said Jelly version.

Also, there's been a similar/the same issue a couple of weeks back on Swiftfin in case it might be relevant.

My guess is it has to do with the unstable version, am I right? Specifically, this happens on the latest branch of Fladder and also on the latest nightly

Reproduction steps

1. Go to any medium
2. Click on 'Edit Metadata'
3. Pick any other poster, backdrop or logo
4. See error

Screenshots

None

Logs

bash
The issue I have upon trying to change metadata:

[SEVERE  |  Flutter error: Exception: (500) Internal Server Error: Error processing request., 2026-03-19T09:05:10.717605

#0      FladderSnack.showResponse (package:fladder/screens/shared/fladder_notification_overlay.dart:143)
<asynchronous suspension>
#1      _EditDialogSwitcherState.build.<anonymous closure> (package:fladder/screens/metadata/edit_item.dart:178)
<asynchronous suspension>
]

Or, furthermore:

POST /Items/<id>
System.InvalidOperationException: Each parameter in the deserialization constructor on type 'MediaBrowser.Model.Dto.TrickplayInfoDto' ...

Platform

Linux

App Version

0.10.2 (1)

Jellyfin server

10.12.0