If the "error code:900000" or "error code:200000" is displayed, please try the following.
1.Reset the update of "Google Play Store"
- "Settings" (of your Device) →Apps→DOWNLOADED
- "Google Play Store"→UNINSTALL UPDATE→OK
2.Update "Google Play Store"
- Start "Google Play Store" App
- menu→Settings→Build version
- Please update "Google Play Store" according to the instructions of the screen.
If the "error code:900000" or "error code:200000" is still displayed, please try the following too.
Reset the update of "Google Play Store" Reset the update "Google Play services" / Update "Google Play services"
- "Settings" (of your Device) →Apps→DOWNLOADED
- "Google Play Store"→UNINSTALL UPDATE→OK
- Cache delete
- Turn off / on your mobile
- Update "Google Play services"
Update "Android System WebView"
https://play.google.com/store/apps/details?id=com.google.android.webview