Our Technical Team is aware of this issue, and they are working on fixing it. As a temporary workaround solution for this problem, please try reinstalling the game. Please do not reinstall the game in case you do not remember your credentials or you haven’t linked your G5 Friends account to an e-mail address.
Notice that you may need to sign in to your G5 Friends account in the game after you reinstall it in order to retrieve your previous progress.
If the problem persists, please contact us at support@g5.com with the detailed description of the problem.