SAFE TaG needs at least one contact to work and you must set them as an Administrator. If they do not accept the invitation you may need to delete and re-enter to send a new invitation. You can have as many contacts as you like and can allocate them to different groups (Work, Private, Tap and GO).
When they have accepted, check your contacts are listed as ‘Accepted’ and click continue.
See ‘How do I set up my App?’ for help to set up contacts.