@Fox I think your new way of saving progress has caused issues when trying to log into an existing game via FB. I just changed phones and when I just tried to set up my second account via Parallel Space, I received this
I just can't log in. I get the same error message EVERY time!
Just as well that I have set up my main account before you introduced the new Android way of saving progress!!!
Edit: Tried another cloning app and get the same error. It just won't let me log into my FB account anymore. I urge you to look into this as I suspect that anybody switching devices or reinstalling their game who haven't save against Google Play yet, will have the same issue trying to get back into their FB progress!!!
Edit 2: Send message to support asking to be connected manually to that account if possible. We shall see....