Have you already tried the built-in OpenWeatherMap driver that Hubitat offers? Simply go to Add Devices, Add Virtual Device, and then make sure you select the "OpenWeatherMap" driver type. Fill in your OWP credentials, and you should get data showing up.
I believe the HPM version is going to be a very custom community solution, which offers more features. I'd recommend starting with the built-in driver first, to see if it is sufficient. If not, you'll receive much better assistance on the community version by posting in that developer's thread.
I am guessing this is the OWP integration that you've installed from HPM?
