Sickbeard plugin : SB doesn't launch at boot, but can be launched after

Hello

I made a fresh install of omv 3.0
then install some plugin like :
Sabnzbd, Subsonic, Couchpotato, transmission
and Sickbeard and configured to use the sickrage git.

But it doesn't launch at boot,
but after boot, if I do a

sudo service start sickbeard

It starts.

I tried almost 20 times, then reboot, then no sickbeard at launch

If i try to see some info :
systemctl status sickbeard.service
● sickbeard.service - SickBeard Daemon
Loaded: loaded (/lib/systemd/system/sickbeard.service; enabled)
Active: failed (Result: timeout) since dim. 2017-11-12 20:50:40 CET; 5s ago
Process: 1221 ExecStart=/usr/bin/python /opt/sickbeard/SickBeard.py --quiet --daemon --datadir /var/opt/sickbeard/ (code=exited, status=0/SUCCESS)

nov. 12 20:49:03 openmediavault systemd[1]: Starting SickBeard Daemon...
nov. 12 20:50:34 openmediavault systemd[1]: sickbeard.service start operation timed out. Terminating.
nov. 12 20:50:40 openmediavault systemd[1]: Failed to start SickBeard Daemon.
nov. 12 20:50:40 openmediavault systemd[1]: Unit sickbeard.service entered failed state.

if the second command is systemctl start sickbeard.service

then
systemctl status sickbeard.service -l
● sickbeard.service - SickBeard Daemon
Loaded: loaded (/lib/systemd/system/sickbeard.service; enabled)
Active: active (running) since dim. 2017-11-12 20:53:31 CET; 2s ago
Process: 2058 ExecStart=/usr/bin/python /opt/sickbeard/SickBeard.py --quiet --daemon --datadir /var/opt/sickbeard/ (code=exited, status=0/SUCCESS)
CGroup: /system.slice/sickbeard.service
├─2071 /usr/bin/python /opt/sickbeard/SickBeard.py --quiet --daemon --datadir /var/opt/sickbeard/
├─2091 /bin/sh -c "/usr/bin/git" fetch origin
├─2092 /usr/bin/git fetch origin
└─2093 git-remote-https origin https://github.com/SickRage/SickRage.git

nov. 12 20:53:31 openmediavault systemd[1]: Started SickBeard Daemon.

As you see it's not working : Active: failed (Result: timeout) since dim. 2017-11-12 20:50:40 CET; 5s ago
there is no output for the systemctl enable sickbeard

I made a dirty workaround

I use monit to monitor sickbeard