How To Fix Google Play Store Authentication Is Required Error

The error may simply be a sign-in issue, which sometimes occurs when the Play Store is updated. The first trick is to go into your phone's main Settings menu and then Accounts and simply remove the Google account you have registered (the one that's getting the "authentication is required" message). Once you've done this, you can re-add the account and it should work just fine. However, you may need to do this step along with the second step below.

Go into Settings > Accounts.

Find the Google Account that's receiving the error message. 

Then remove that account and re-add it. 

Try a fresh sync

It's possible that things aren't syncing for some reason, and just need a little push. Go to your Settings, tap Accounts, then Google, your email address, and Sync all. Then you can go back to the Play Store and see if the authentication message is gone.

Clear data from the Google Play Store

To clear data from the Play Store, you need to go into Settings and then Applications and find the Google Play Store. Tap it and than select Clear data. (You can try just clearing the cache first, if you like, but clearing data will clear the cache as well). If the previous step didn't work for you, you may find that it does if you repeat it after carrying out this step. 

Go into Settings > Applications and select Google Play Store. 

Tap on Clear Data and confirm when prompted. 

Download an app using your mobile browser

Go to your web browser and navigate to the Google Play Store website. Try downloading an app directly from there rather than through the Google Play Store app. Just sign into your Google account through your browser and then install the chosen app.

Uninstall Play Store updates

Sometimes the problem is not with your credentials but the Play Store itself. Go to the Play Store in Settings > Applications and hit Uninstall updates. This will take you back to the original version of the Play Store that was installed on your device. Then, all you need to do to fix the error is install the latest version of the Google Play Store and sign in once again.

If the problem lies with the Play Store itself, go into its settings and uninstall the updates. 

Uninstalling Play Store updates will set it back to the version that came on your phone. 

If you're still having problems after trying all these steps, run through them again in this order, rebooting your phone between the steps: remove Google account, reboot, uninstall updates, install new Play Store, reboot, add account, and so on. Just keep trying until the error goes away.

The last resort: factory reset

One user tried everything and still couldn't get rid of the error message. But, the last resort worked: a factory reset. Here's how to do it.

Have you suffered from the "authentication is required'' error in Google Play before? How did you solve it? Let us know in the comments below.

Source : https://www.androidpit.com