minor: snapper services not starting after insallation

Get 1 http://nl.archive.ubuntu.com/ubuntu zesty / universe libsnapper4 amd64 amd64 0.4.1-1 [249 KB]
Get 2 http://nl.archive.ubuntu.com/ubuntu zesty / universe snapper amd64 amd64 0.4.1-1 [316 KB]
565 kB picked up in 0s (1097 kB / s)
Previously selected package libsnapper4 is selected.
(Database is read ... 256701 files and directories currently installed.)
Unpack ... / 0 libsnapper4_0.4.1-1_amd64.deb prepared ...
Busy unpacking libsnapper4 (0.4.1-1) ...
Previously selected package snapper is selected.
Unpack ... / 1-snapper_0.4.1-1_amd64.deb prepared ...
Busy unpacking snapper (0.4.1-1) ...
Setting libsnapper4 (0.4.1-1) ...
dealing with triggers for libc-bin (2.24-3ubuntu1) ...
dealing with triggers for man-db (2.7.6.1-1) ...
dealing with triggers for dbus (1.10.10-1ubuntu2) ...
Setting snapper (0.4.1-1) ...
Created symlink /etc/systemd/system/timers.target.wants/snapper-boot.timer → /lib/systemd/system/snapper-boot.timer.
Created symlink /etc/systemd/system/timers.target.wants/snapper-cleanup.timer → /lib/systemd/system/snapper-cleanup.timer.
Created symlink /etc/systemd/system/timers.target.wants/snapper-timeline.timer → /lib/systemd/system/snapper-timeline.timer.
snapper-boot.service is a disabled or a static unit, not starting it.
snapper-cleanup.service is a disabled or a static unit, not starting it.
snapper-timeline.service is a disabled or a static unit, not starting it.
dealing with triggers for dbus (1.10.10-1ubuntu2) ...

done..