For Android 8.1.0, look for variants labeled "Android 8.0+" or universal builds.
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Once you've downloaded the correct APK file, follow these steps: google play store apk for android 810 link
Go to Settings > Apps > Google Play Store , tap the three dots in the corner, and select "Uninstall updates". Then, try installing the new APK again. For Android 8
Here is the direct link for Android.
You installed a custom firmware that did not include Google Mobile Services (GMS). For Android 8.1.0
The Play Store app can sometimes become corrupted, resulting in persistent crashes or server errors.