I have Duplicati running well on OpenSUSE LEAP 15.2 but the PRM install does not work “out of the box.”
I start Duplicati with systemd, so created the files per the Linux install instruction - all OK but initially Duplicati would not start.
Solved:
The scripts to start Duplicati in the RPM (/usr/bin/duplicati, /usr/bin/duplicati-server) are looking for bash with #!/usr/bin/bash.
In OpenSUSE bash is found in /bin/bash so editing these scripts to change #!/usr/bin/bash to #!/bin/bash fixed the issue.