KeePassXC import from Vaultwarden

Hello everyone,

I want to have backups of my Vaultwarden installation locally into KeePassXC. I export the data as an encrypted .json. In KeePassXC I can choose imports from Bitwarden (json) with password. But the import is always empty.

My question: Is the export of Vaultwarden different from the export of Bitwarden or why do I have empty imports in KeePassXC. Maybe someone has experience with this.

Any help is more than welcome.