I have been using Spotify for premium for a long time. After seeing the family membership and the discount my sister and I decided to change our account membership to a family membership.
So, we changed our account to family membership from my sister's account. Later, we got the confirmation e-mail from the Spotify. My sister and I started to use premium family membership a month ago, but today my sister's "premium for family" account has canceled by Spotify.
Today we tried to log in with the invitation but Spotify didn't accept and it writes you need to stay in the same address but she is actually staying the room next door.