How to fix Error RH−01 on Google Play Store (Nothing else worked)

Updates are meant to keep apps running perfectly, and stay protected from bugs. This is true, but only when the updates are installed correctly, and on a stable Internet connection. Maybe the latest version of the Google Play Store app is the reason for the error code RH−01, probably because it was downloaded and installed improperly. In order to resolve this issue, you will need to uninstall the Google Play updates, i.e. revert it to the default version, and then install the updates again.

To uninstall the updates, follow the steps mentioned below:

1. Go to Settings and tap on Application Manager/Apps;
2. Tap on Google Play Store, and select Uninstall updates;
   

   
   
   

3. Tap on OK to confirm; 
4. Open the Google Play Store app.
   
   

The video guide below demonstrates how to uninstall updates:

Note: The video above is taken on a Samsung Galaxy device, running on Android OS 8 - the steps described may slightly vary from one device to another

If the other solutions didn't work, reset your device to its factory settings. This course of action will remove the corrupt system files from your device and resolve many issues along the way.

To reset your device to its factory settings, follow the steps below:

1. Backup your device's data to any cloud storage service (e.g. to Google Drive, Dropbox) or to a computer;
2. Go to Settings, tap on Reset and tap on the factory reset option;
   

   
   
   

Feel free to watch the tutorial below, on how to reset your device (taken on a Samsung Galaxy device, running on Android 8 - the steps described may vary from one device to another):

Note: Make sure that your device is fully charged before resetting it, to avoid additional complications. Also, do make a backup of your personal files (photos, videos, music, and other documents), so that they are safely stored.