I'm trying to build L shaped stairs I removed the foyer foundation only keeping a part with the L shaped and I only have one set of stairs that's going to the ground, I'm just having troubles trying to build the other half of the stairs, I tried remove a bit more of the walls and the foundation and nothing, I have the upstairs done, because I thought that was what the problem was that I needed to finish the 2nd floor. When I try to place the stairs on the edge of the foundation it tells me, "can't place in the current location". So I'm not sure if I am doing something wrong or not.

Here is a Tutorial. Note that she says it only works with a basement. https://m.youtube.com/watch?v=vnrPrR31W68