Can't connect to Google play to synchronize android phones
I suggest you try clearing the cache and data for the Google Play Games app. Once done you can now start up Solgard and it should connect correctly.
If the issue is still there then try re-installing the Google Play Games app.
I've found this page that might also help you out: https://www.theandroidsoul.com/fix-cant-login-into-google-play-games-in-any-game/
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