I was able to setup the Aria 1 properly for myself. But when I send an invitation to my wife, it goes like this:
She clicks the Accept button in the email, which goes here:
https://www.fitbit.com/onboarding/scale-consent/Aria?senderId=XXXXXX&serial=XXXXXXXXXXXXXXXX
Then, she clicks I AGREE and is being transfered here:
https://www.fitbit.com/user/YYYYYY
But the Aria 1 is not added to her web dashboard, or in the iphone app.
I also tried the trick where you insert the serial in the link below, and it didn't work. It just opens a page with the Fitbit logo in the center.
https://www.fitbit.com/settings/device/scale/XXXXXXXXXXXXXXXX?inviteAccepted=true
From this page, in Chrome DEV TOOLS, I can see 404 errors for some JS files. (Replace XXXX with the serial number of my scale)
GET https://web-api.fitbit.com/1/user/-/devices/scale/XXXXXXXXXXXXXXXX.json 404
