My form disappears when I use the gf-add-placeholder.
I'm using it on a drop down list.
When I accidentally typed gf-dd-placeholder it appeared again but obviously it wasn't working.
Oh, and I don't really understand what I'm supposed to do to get it working anyways. All I understood was that I had to fill in the css class with gf-add-placeholder.
I made another test form where I just had one drop down list, applied the gf-add-placeholder and it did nothing at all. I don't know what's going on