When I click Play Button It doesn't work on "Maximize On Play"

As I said above, When I click button top of the Unity, ıts change turned into blue but It’s not happening.

I’m new on Unity and I simply just made a “Start Game” button in it. “Start Game” button has to be changed it’s color when I click on it. But nothing is happening.

Actullay It was working before I updated it. I updated Unity to 2019.4.12f1

Any help will be appreciated. Thanks for your interest.

(As I said ıt’s working ıf I don’t click “Maximize On Play” and game doesn’t switch to the big screen)

Any toughts ?