I got the message for both.
Couldn't uninstall.
Then the program froze.
Had to quit.
Then restarted.
No change.
I guess I have two icons
Display More
If its on your homescreen then you can hold ok button on google play store and remove.
If you have serious 2 times playstore in the apps section.
Its very strange yes. Never had or seen it.
What can you do:
Download adb tv app manager via playstore.
Open it and give it all permissions it ask about. Like give it user access.
Enable developers settings and then enable USB debugging.
Step 4 is allow this pc and then allow
Connect.
You see adb app now.
Slowly press down button till you find 2 (two) times the google playstore.
Delete one due click on it and click uninstall.
If you only find one google playstore.
Then you can disable it by the yellow button and or when you click on it.
Restart box.
Check how many icons you have.
Maby its okay now or you start adb again en go to playstore and enable it again.
In worst case factory reset but i wont do it. To much work.
Maby a app sideloaded? Remove then the fake playstore.
The right playstore app package name is: com.android.vending
Any another with google play store should be wrong.