I followed the guide for adding Synology NAS (RS812 with latest DSM) as a Linux server/repository (intended as a target for Backup Copy job - secondary location). I was able to add the server, Veeam is able to log in with provided credentials (root), but repository rescan (or attempt to set it up as a Target for Backup Copy job) fails with the following message:
Failed to synchronize <sitename> Details: Timeout to start agent
On NAS itself I can see incoming traffic (uploading tarball) but nothing happens and I found no error messages in NAS logs.
I ran out of ideas
(Veeam Backup&Replication 18.104.22.1684)