If the Play Store is missing or outdated on your 8.1.0 device, you can manually update it using an APK:
Sideloading the latest forces Google’s servers to recognize your device as up-to-date, restoring full functionality.
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: This is often caused by a cache mismatch. Navigate to Settings > Apps > Google Play Store > Storage and select Clear Cache and Clear Data .
When that happens, you are left with an ancient Play Store version that: