ERROR: Authentication failed - java.util.concurrent.ExecutionException: 4 out of 4 underlying tasks failed

[Dev-Seere]

ERROR: Authentication failed - java.util.concurrent.ExecutionException: 4 out of 4 underlying tasks failed

Most of devices are works perfectly, but some devices(Sony xperia xz1, Android version: 9(pie) and Samsung galaxy s10) are not worked properly with have that issue. Is bug? or what i miss something?

[kx23]

I have the same problem

[kx23]

I fix it by change my package name. My past package name included capital leters (was generated by Unity). After replacing uppercase letters with lowercase, everything worked.

[yigiteren]

I am having the same problem while trying to integrate Google Play Game Services to a game that is already on Play Store. Is this really due to package name? Play Store prevents us renaming the package name, and we don't want to create an entirely new app to do it. Are there any other solutions to this?