No backup possible anymore, no download and no upload

Hello there,
I need help because I have now changed my server and wanted to upload my old backup to the new server. Sorry, that is not possible. I can’t do it when I start it and it doesn’t work when I create an account and the three points above are missing when it comes to backup. They’re just not there. Can someone help me? I tried it on 2 devices and it didn’t work with the app on my cell phone either.

So the real problem is that I can’t upload and restore backups.

  • Core 2023.12.4
  • Frontend 20231208.2

Thanks in advance