So i have this kind of problem. That one of my family member entered our previous aadress. For little time she had premium and then it dissapeard. I asked her what happend, and she said it asked again same thing like in the beginning. She re-entered all the same information there again. I suppose she is now BLOCKED? I tried entering our current aadress and information and it writes like I mention below.
And now when I sent, new invite, it writes " You're unable to join this family plan."
I'm sorry for that. Sometimes the information once given to Spotify (regarding the users’ addresses) don’t match the ones they have. The data might be incorrect, incomplete or outdated, hence the removal of some users.
In this case I suggest you get in touch with the Spotify Cares staff - They'll be happy to help you further with this.