Usually because Google Play Services is outdated. Update Google Play Services from APKMirror first (version 22.x for Android 8.1).
A prompt will ask if you want to install an update to the existing built-in application. Tap . Wait for the process to complete, then tap Done or Open . Critical Troubleshooting Tips Google Play Store Android 8.1.0 Apk
: Locate the file in your Downloads folder, tap it, and select Install . Usually because Google Play Services is outdated
: The Play Store cannot run without Google Play Services . If your Play Services framework is outdated or missing, you must download and install the matching Google Play Services APK for Android 8.1.0 first. : The Play Store cannot run without Google Play Services
If your Play Store is outdated, crashing, or unable to download new apps, you may need to manually install the latest compatible . What is the Google Play Store Android 8.1.0 APK?
Downloading system files from unverified websites can expose your device to malware.