Observium Graph shows no data

Brand new installation using the latest distribution for observium community version CE 0.16.10.8128 and also tested using both the latest 16.04-2 and 17.04 Ubuntu server version.

Configuration using the official guide http://docs.observium.org/install_debian/ 

After installation and configuration added hostname of devices I need into Ubuntu host file, added device via observium web interface, ran the following command in Ubuntu cli

/etc/observium > sudo discovery.php -h all

/etc/observium > sudo poller.php -h all

Waited for hours but no data in graph.

From the web interface if I click into the new device added I can actually see the CPU current usage, memory usage, storage, CPU temp e.t.c. so it is reading data. I can also see the interfaces on the router that I have added

Seems like a bug somewhere to me as I've follow the install guide to the bits. Anyone have any suggestions will be mostly appreciated as no graph data in observium is a deal breaker for us.