Cover doesn't work after installing on new computer

I installed Mp3Tag on a new computer. The covers are not displayed when playing. If I update the album in the old innatallation it works properly. Can anyone help?
Thanks

So it is a player problem?

id isn't player problem

As MP3tag does not play files you would have to show us in MP3tag where you are missing pictures.
A check of the options to display the first picture from the current folder would also be informative:

As far as I know, Mp3tag has no built-in music player.
Do you miss the album covers on your external player, such as the one provided with Microsoft Windows 11?

This attitude hasn't changed anything.

I use HIFI-cast or Bubble Unpn on Android.

Do you see the Cover inside Mp3tag on a track?
Please show us a screenshot.
It depends on whether the cover is embedded in the track or is a separate file (PNG, BMP or JPG) in the same location as the track.

Yes, I see the cover.

I have the same procedure on both computers. It works as before on the old one, covers are not displayed on player

on the new one.

Please check what kind of files these are and what kind of tags (ID3, FLAC, APE) you have in the files.
A screenshot from the extended tags dialogue of a single file helps.

kind of tags : FLAC.

2 screenshots

Can you confirm that you are using the same version of the UPnP server on both computers?

Does a working FLAC file created by your old computer show the cover when you copy the track to your new computer?

I just ran a test with a new file. Maybe the TAG setting changed something. I'm just waiting now.

Thank you for your help so far.

AFAIK you cannot set any other tag version or encoding for FLAC tags.
The question would be if any other, older FLAC files displayed ok.