Software SolutionsWhy is the screen black when I use the desktop camera tool?

I am having the same issue. 

When I try to use the camera tool there is a black screen. 

I have used this feature for many years and it has suddenly changed.

I have a MAC desktop.

SOFTWARE LICENSE AGREEMENT: PERSONAL LICENSE (“License”) V1.5 (December 2010) For ActivInspire (“the Software”)

Thank you.