Failed to sign in to 'Google Play Games'

[JunkwareAPPS]

I have linked my android app to game services. I downloaded the Google Play Services Extension from the marketplace.

I can sign in and access the leaderboard in my game when Game Services is set to 'Testing' in my Google play console.

The PROBLEM is when I then change Game Services to 'published'.

That's when I get a message saying that it fails to sign in during my game. I have seen this concern raised in other posts but not yet solved. Please has anybody else come across this and fixed it??

Thanks in advance.

 

[Vince3006]

I had the same issue. I wont go through all the darn command line stuff to find it but this is how I fixed it.
Google Play Console
Upload new release (alpha, beta, closed, whatever).
Before rolling it out, save as draft.
Game Services--> Your App--> Linked Apps.
Click on your app linkages.
One by one of the same app if necessary and delete.
Create a new Client ID (Linkage) and accept default SHA1 code.
Finish release roll-out.
I made sure correct version was downloaded/Installed from Playstore and everything worked.
I really hope this helps people, it's one of my first posts.

 

[Ernesto Romero]

I did not understand you, could you help me?