Thanks a lot for the tip!
While manipulating with proxmox-backup-client i guessed that most likely a problem with the rpermissions, after that I immediately found the error.
On the new server, I decided to do everything right and created a separate user to synchronize with the PVE and gave him...
I am transferring a backup from one physical server to another. Content are encrypted
I have set up synchronization through the "REMOTES" and "Sync Job"
The content has been transferred successfully and I can see it in the interface "new" PBS.
I connected the datastore of the new PBS to the PVE...