Need help getting FreeBSD urbackup-client v2.3.4_1 to see Debian 10 UrBackup server on the same subnet

I’ve already gotten urbackup-server up v2.3.8 up and running on Debian Buster.

I’m tying to get urbackup-client v2.3.4_1 (the latest release available for my OS) working. My OS is Project Trident, which is basically FreeBSD 12.0 RELEASE with Lumina desktop environment and OpenRC. Don’t worry too much about the OpenRC part as it only affects the service functionality and shouldn’t affect the ability to launch the client.

However, after installing the client package, the only command the OS seems aware of is /usr/local/bin/urbackupclientctl. When I try running that command directly, I get error messages, such as:

➜ bin urbackupclientctl set-settings
urbackupclientctl: No such file or directory
Cannot read backend password from /var/urbackup/pw_change.txt

The package notes say:

the GTK2 GUI
needs to have one of the following in its PATH:
- kdesu (e.g., /usr/local/lib/kde4/libexec/)
(port: x11/kde-runtime)

Does anyone know what that means and how I’m supposed to accomplish it? Or any way to get the client up and running in FreeBSD at all?

FWIW I’ve documented my steps so far here.

Any ideas? I got the client backend running in the background using:

➜ ~ sudo /usr/local/sbin/urbackupclientbackend -d

But the log file indicates it’s starting up its own server instead of looking for one on the LAN?

2019-09-27 09:30:37: SQLite: recovered 24 frames from WAL file /var/urbackup/backup_client.db-wal code: 283
2019-09-27 09:30:37: urbackupserver: Server started up successfully!
2019-09-27 09:30:37: Started UrBackupClient Backend...
2019-09-27 09:30:37: FileSrv: Servername: -DellOptiplex390-
2019-09-27 09:30:38: Looking for old Sessions... 0 sessions
2019-09-27 09:30:47: FileSrv: Servername: -DellOptiplex390-
2019-09-27 09:30:57: FileSrv: Servername: -DellOptiplex390-

Any ideas as to why this is happening?