If you sign out while synced to a Game Center or Google Play account, you'll get a connection error message. This will prevent you from logging in to Marvel Tsum Tsum and prevent data from being displayed. In some cases, a new account will be created, restarting the game from the beginning.
It is possible to fix this issue by trying the methods below:
1. Force close the Marvel Tsum Tsum app. Then, sign in to Game Center or Google Play depending on your OS. After that, restart Marvel Tsum Tsum and sync your account again through "Data Transfer".
2. If this happens when you are still signed in, try signing out of Game Center or Google Play and signing in again.
Please contact our support team if you are unable to fix this issue even after trying the methods above.