Hi!

I’ve recently found the SFML Tic Tac Toe course, where I had the same problem that this user had:

http://www.sonarlearning.co.uk/questions.php?question-topic=703

I fixed it by using the debug libraries instead of the normal ones like he said in the comments of that post, but after that I get this other problem:

Link to the Image of the problem 

Like the user on the post I mentioned I am using Visual Studio 2017 with the last SFML version.

How can I fix it?