Readycloud services unavailable

Two questions actually, I'm trying to set up Readycloud.

Firstly when I toggle on Readycloud in the GUI, "Services unavailable", cannot attach device appears.  I have a myNetgear account which is logged in and I can access the nas remotely using the Readycloud portal and the same MyNetgear credentials.  Why is this error message appearing?

Secondly, it seems adding additional users is not straightforward.  I have granted access to someone, entered their email address, they have received the invitation and successfully created a MyNetgear account.  When this user tries to access the nas remotely they receive a message that they have no registered devices.  I've tried the "Discovery on" function, this allows the user to see the nas (on the LAN), but there is no option to register the device to that MyNetgear account, there is an option to manage which links to the local admin pages.