I'm trying to sign up to the 3-month Apple TV+ trial but each time I click 'Buy me' I'm taken to a pop up which says 'Cannot Connect'. What does this mean? I can see the Apple TV+ app open in the background but when I close the pop up window, I cannot see the option to sign up for the 3-month trial, only the 7 days offered directly by Apple TV. Can anyone shed some light on what I need to do? As an Apple user, I have an existing Apple account, however - as I understand the T&Cs - this should not prevent me from signing up to the EE trial.