Hi Alex,
Thanks for trying that - our technicians have now raised the following investigation for this 'INV-50511 - Billing page does not load on iPhone app and in iPad web browser' as this now appears to be impacting several users.
We've linked your account so that you'll be notified via email as soon as this is resolved, in the meantime, if you have a Windows or Android device please try subscribing using this as a workaround. 🙇:female_sign:
