Update 6/3/2020:
We are aware of the problem with logging in to Google Play. We're currently working on a fix so please bear with us!

Thanks for your patience :)

We hope that you can continue enjoying the game without the Google Play game services in the meantime, and we apologize for any inconveniences caused.

Please make sure you are connected to Google Play by clicking the Google Play button and follow the instructions.

If you are using an Apple device, please make sure that you are connected to a stable internet and signed in to your Game Center account.