Debian Linux client cannot connecto to backup server

Hi, first time here.

I have the server running in a Freenas jail, with a Windows client successfully backing up.

When adding an Ubuntu 18.04 client, it compiles, installs, and runs on system start. It looks like the urbackupclientbackend is also running. But, the client cannot connect to the server. Have read the security content and tried changing the server identity, but that didn’t help. Tried uninstalling and reinstalling but that didn’t help. I’m missing something.

Any ideas and thanks?