Because 4.2.2 is legacy, you may need to manually update the Google Play Services APK after booting to get the Store to connect to Google's modern servers.
Google Apps, commonly referred to as Gapps, are a set of applications developed by Google that are pre-installed on Android devices. These apps include popular services such as Google Play Store, Google Maps, Gmail, Google+, and more. However, when it comes to customizing or modifying an Android device, users often need to flash a custom ROM, which may not come with Gapps pre-installed. This is where the Official Gapps for Android 4.2.2 Jellybean Flashable.zip comes into play.