Zenless Zone Zero Google Login Authorization error has been frustrating Android players ever since launch, with quite a few complaining about being unable to dive into the game because of it. Given that fans have been ardently looking forward to the global launch, it is unfortunate that such bugs and errors are plaguing the experience.
Fortunately, we have a few fixes that you can try to resolve the Zenless Zone Zero Google Login Authorization error. This is a recurring problem and it is unlikely we will see a permanent fix on that matter due to its nature.
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How to fix Zenless Zone Zero Google Login Authorization error [Possible fixes]
Here are a few ways to possibly fix the Zenless Zone Zero Google Login Authorization error:

Check your internet connectivity
Due to poor network connection, the game might not be able to connect to the servers or authorize your account. Thus, your first step should be to ensure your internet connection is stable. If you are using WiFi, restart the router and see whether the issue persists.
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Force Stop and restart the Google Play Store
Restarting the application might resolve the Zenless Zone Zero Google Login Authorization error. You can do so by going to your phone's Settings, further to Apps, and finding Google Play Store from the list. You will get the option to Force Stop. Do so, wait for a few seconds, and restart the application.
Clear Google Play Store cache
Apart from force stopping, you can also choose to Clear the cache from the same place. Cache files have been known to contribute to issues such as the Zenless Zone Zero Google Login Authorization error.
Forgot Password/Reset Password
This might be a bit of a hassle for players, but it has been reported that resetting the password for your Gmail and HoYoverse accounts has solved the issue. Do give it a try before jumping onto the final two steps.
Remove and re-add your Google account
Try removing and re-adding your Google account (with which you are playing ZZZ) from PlayStore. Perform this step only if you remember your password to log back into the account.
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You can perform this step by going to Settings, then Accounts, and choosing Remove account for the one you wish to. Once done, you can select Add Account and Google to log back in.
Delete and re-install Zenless Zone Zero
This is a possible fix we wouldn't suggest right out of the bat (looking at the Zenless Zone Zero Android file size). Do keep in mind that re-installing the game does not guarantee the issue will be fixed but the step has more often than not resolved persisting problems on the player's end.

The game's servers being overwhelmed can also mean that players are unable to log in with their Google account. In that case, you will likely see others complaining of the same error on online forums. If the aforementioned steps do not resolve the Zenless Zone Zero Google Login Authorization Error, try to log into the game sometime later.
Disclaimer: The fixes provided above serve as possible workarounds and are not guaranteed to work.
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