Error at start Ubooquity

Hello everyone, i tried to Install Ubooquity in my Nas DS612+ using Putty with this: 

https://vaemendis.github.io/ubooquity-doc/pages/tutorials/install-on-synology.html

and this tutorial:

https://www.chrisanthropic.com/blog/2016/ubooquity-comics-server-on-synology-nas/

and i have always the same problem when i tried to run the cmd : start ubooquity

ruben.san.pal@Pandore:/etc/init$ start ubooquity
start: Rejected send message, 1 matched rules; type="method_call", sender=":1.30" (uid=1026 pid=20964 comm="start ubooquity ") interface="com.ubuntu.Upstart0_6.Job" member="Start" error name="(unset)" requested_reply="0" destination="com.ubuntu.Upstart" (uid=0 pid=1 comm="/sbin/init ")

i modify the ubooquity.conf files using my parameter : volume1/Comics, and also Java8. I don't know if i need to modificate other thing to start ubooquity.

Thank you very much for your help, i tried to use other topics but i don't find this error.

I can give other information if you needed 

Thanks !