Followed the installation for UniPi and got some errors:

Setting up owserver (3.2p3+dfsg1-2) ...
Job for owserver.service failed because the service did not take the steps required by its unit configuration.
See "systemctl status owserver.service" and "journalctl -xe" for details.
invoke-rc.d: initscript owserver, action "start" failed.
● owserver.service - Backend server for 1-wire control
Loaded: loaded (/lib/systemd/system/owserver.service; disabled; vendor preset: enabled)
Active: activating (auto-restart) (Result: protocol) since Wed 2019-07-31 21:48:45 CEST; 231ms ago
Docs: man:owserver(1)
Process: 662 ExecStart=/usr/bin/owserver -c /etc/owfs.conf (code=exited, status=0/SUCCESS)
Main PID: 662 (code=exited, status=0/SUCCESS)

Jul 31 21:48:45 raspberrypi03 systemd[1]: owserver.service: Service RestartSec=100ms expired, scheduling restart.
Jul 31 21:48:45 raspberrypi03 systemd[1]: owserver.service: Scheduled restart job, restart counter is at 1.
Jul 31 21:48:46 raspberrypi03 systemd[1]: Stopped Backend server for 1-wire control.
dpkg: error processing package owserver (--configure):
installed owserver package post-installation script subprocess returned error exit status 1
dpkg: dependency problems prevent configuration of rex-owsdrvt:
rex-owsdrvt depends on owserver; however:
Package owserver is not configured yet.

dpkg: error processing package rex-owsdrvt (--configure):
dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of rexygen-runtime:
rexygen-runtime depends on rex-owsdrvt (= 2.50.9-10679~Raspbian~stretch); however:
Package rex-owsdrvt is not configured yet.

dpkg: error processing package rexygen-runtime (--configure):
dependency problems - leaving unconfigured
Errors were encountered while processing:
owserver
rex-owsdrvt
rexygen-runtime
E: Sub-process /usr/bin/dpkg returned an error code (1)