"Unable to sign in to Google Play Games" reported by Android Theory test app

This is a known issue, which the app developers are working to resolve.

When an update to resolve this is available it will be published through the Google Play app store - please ensure that you apply all updates as they become available.

In the meantime, touch "OK" to dismiss the message and continue using the app but you will not have access to your "Achievements" through the "Progress" selection.

21st December 2016