Installed JSPrinterManager7 on Ubuntu but shows License too short

[Helkyd]

Hi,
I have installed and set the code on my JS...
Doing this sudo jspm7 --reinstall-certificates does nothing
Also i have added a site but shows nothing also and when i run the Page it asks to add my site to Allowed but when i go and check the it still shows nothing...

I receive this message on the console

What should i do ?