CaptureScreenshot not working in 2018

I have a tool which captures a screenshot in the editor, I've used it for months and it doesn't seem to work after upgrading 2018.

Code (CSharp):

1. public static void Capture(int scale)
2.     {
3.         if (!Directory.Exists("Screenshots"))
4.         {
5.             Directory.CreateDirectory("Screenshots");
6.         }
7.         string path = "Screenshots/" + SceneManager.GetActiveScene().name + "_" + System.DateTime.Now.ToString("dd.MM.yyyy_HHmmss") + ".png";
8.         ScreenCapture.CaptureScreenshot(path, scale);
9.     }

Weirdly this script worked just once since the upgrade. Has anything changed which might effect have broken it?

Cheers for any help!

 

what about it doesn't work

 

Typically I have found the fix immediately it after posting. You have to have the Game view open for ScreenCapture.CaptureScreenshot to work.
It doesn't mention that in the documentation, but maybe it's too obvious!