Just added the command that I needed to launch in order to have the timer running
$ systemctl list-timers
NEXT LEFT LAST PASSED UNIT ACTIVATES
Sat 2020-04-11 12:01:00 UTC 19h left n/a n/a restart.websocket.pathfinder.timer restart.websocket.pathfinder.service
Just added the command that I needed to launch in order to have the timer running