Can’t Setup WiFi thru GCM (iOS) for Fenix 5

Hi, 

My wife recently bought a Fenix 5s (sapphire, WiFi) and no matter how many times we try to setup the watch’s WiFi through the Garmin Connect app on her phone, we get a “something went wrong, please try again” message. 

We've tried multiple networks, none of which are hidden by the way, but no luck.

Has anyone successfully setup a WiFi network thru the GCM app for their Fenix 5?

Thanks