Mesh Tool - A Mesh Editor

I drag 2 static meshes onto the scene and then put one inside the other and I get an error: “Can’t Boolean, Boolean failed!” Is there something special you have to do to get the Boolean to work?

PS: I have tried a lot of different ways but always get the error message. I am on ver 4.19

I followed this video but the boolean does not work on anything, that was one of the main reasons I purchased this tool.

https://www.youtube.com/watch?v=SxUc…&index=49&t=0s