First solution: Restart/soft reset your phone then relaunch Google Play Store app.
Second solution: Clear cache and data on Google Play Store and Google Play Services.
Third solution: Uninstall and reinstall Google Play Store updates.
Fourth solution: Reset network settings on your phone.
Fifth solution: Update phone to the latest Android system available.
For further assistance and more advanced troubleshooting methods, contact Google Support or visit Google support website to gather inputs and other ways to fix Google Play that keeps crashing or not loading properly on your Huawei Nova smartphone. Alternatively, you can contact your device manufacturer or Huawei Support team for more help.