Basically the same issue with this post from a year ago construct.net/en/forum/construct-3/general-discussion-7/cant-connect-google-play-141488 but the topic went silent...
Play services seems tried to loading for a split second, then poof, gone. nothing happen.
1. I have used signed key
2. I have put the SHA1 into play game api on dev console web page
3. I have published an internal release (but it says stuck in review).
btw is the 3rd thing i mentioned above necessary? i prefer to directly test rather than going thru play console website.
oh!, and how can i check the 2nd thing i posted above? in case maybe i pasted wrong SHA1.