Error when exiting

[Mechanical Man]

I currently use 1.26 version of warcraft, so it can be played with w3arena, so I have access to the correct widescreen ratio. But upon exiting game an error occurs. It doesn't affect gameplay, since it appears on the exit, but it's annoying, although few maps don't work. I used 1.26 (when 1.27 was already out) when I was still on windows 7, I had no error there. But under windows 10 this seems to have a problem.