I play with multiple accounts.
Some are in Facebook Gameroom, and all accounts are on NOX Emulator (running multiple emulators), and this error started yesterday, and now all my accounts on NOX (that is an Android Emulator) connected to some (but different) Google accounts (Google Play) are giving me this error message.
The only exception is for one account on NOX that ISN'T connected to any Google account (no access to Google Play) and one other account that is connected to a Facebook account and also NOT connected to Google Play.
I don't have any problem with my accounts on Gameroom. I believe is a Google Play error as someone above said it's affecting other games.
SWC Windows survivor.
Imperial HQ 11 & Rebel HQ 11 on vacation.