Hi, I can't play chess game, appear white window over the chess board and freeze the play

I can't play the chess game.

Over the the chess board appear small white window and freeze any movement that I want to do,

also I have no way to go back or forward or use the red dot at the left corner of the screen to close the window or quit the game.

What should I do to fix it?

iMac 2011

macOS Sierra

version 10.12.6

Posted on Aug 16, 2017 1:15 PM

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Hi, I can't play chess game, appear white window over the chess board and freeze the play

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