Error message won't go away
I have an error message on my screen that popped up after i tried to open a game that I downloaded and installed via Wineskin on my macbook air. The messages says that there is no Windows-program configured to open this kind of file. The problem is that i can't close the message. There is a button with OK but when i click on it nothing happens. And in the applications bar below i can't stop the program either. I tried to restart the computer it but won't turn off. How can i make this message go away?
MacBook Air, iOS 10.3.3