Guys this is an easy fix and the reason is pretty easy to determine. The reason is because of Androids "Optimize battery Usage" feature it puts the google play store to sleep or google play services and restricts background activity. This means that when your phone screen turns off the app is put to sleep so it does not consume battery or if the phone is ...
Check the Internet Connection and again Open the Google Play Store App.
Clear the Google Play Store App Storage
Go to Device Settings -> Apps-> Find Google Play Store App
Go to Play Store App Detail
Click on Storage
Click on Clear Storage
Delete App Data? Click Ok
Re-open the Application
I had the same problem today (just after updating my phone) and eventually found a way to uninstall Google Play Services updates, thanks to the thread in Google Play Help Forum:
I was able to fix the issue today, by uninstalling the Google Play Services updates. Could only do that after making sure 'Find My Phone' was no longer a device administrator. ...
You probably share usage and diagnostics information of that device with Google. In this particular instance, It means that Google Play Store was connected to its server and as stated "Updated usage information of some apps". The information can be when last you used the apps, how long, etc.