Hi there and welcome
Can you do the following please.
Go to system settings, Accounts, Google and remove your Gmail account
Then go to settings, Apps Swipe to all, All, press Force stop then Clear data and cache for Google Play Store, Google Service Framework and Download Manager
Then go to settings, Accounts, Google and again add your gmail account
Restart your phone and then accept all the Google terms and setup Google settings if asked
Rerun Google Play Store and tell me please if you still get the error
Let me know the results please