Blanchet,
I followed your guide and have access to the admin interface, but I'm trying to use rsync and it is refusing to back anything up. My target system is a CentOS 7 system. I have scp'ed id_rsa.pub to the root/.ssh/authorized_keys and passwordless root entry seems to work. I get:
2019-11-30 18:23:16 full backup started for directory /
2019-11-30 18:23:17 Got fatal error during xfer (No files dumped for share /)
2019-11-30 18:23:22 Backup aborted (No files dumped for share /)
2019-11-30 18:23:22 Removing empty backup #0
2019-11-30 18:23:22 BackupPC_backupDelete: removing #0
2019-11-30 18:23:22 BackupPC_backupDelete: No prior backup for merge
2019-11-30 18:23:22 BackupPC_refCountUpdate: host
eagle.roch.robinson-west.com got 0 errors (took 0 secs)
2019-11-30 18:23:22 Finished BackupPC_backupDelete, status = 0 (running time: 0 sec)