Main Menu stuck being greyed out, can't play

Every time I open my game,, I am stuck on the Main Menu and it is entirely greyed out.

 I still get the full screen pop-ups for advertisements, and the smaller pop-ups, but when I close the pop-ups, the screen remains greyed out and I cannot click on anything. I have tried clicking "Esc" button as well as maniacally clicking everywhere on the screen to try to find the secret hidden "X" or something...

The only way to get out of the greyed out main menu screen is to close the game entirely. 

I play in Windowed Fullscreen mode on PC. I would try to see if this happens in full screen or windowed mode but I can't do more troubleshooting due to the greyed out screen.