[Observium] Setting up email alert notifications

Hi,

I'm looking to set up alert notifications to help with the monitoring of the devices which we already have loaded into Observium, but having some trouble.

See below attached image.

This is how I currently have alert checkers set. As you can see there are 0 entities being loaded into all alert checks, despite using all devices, and I can't find anything about how to get entities to load.

Could someone assist me in how to successfully set up the notifications? We have over 200 devices being monitored in Observium, adding email notifications would improve the system dramatically for us.

Regards, Alex.