I've used Page Tree Creator for years to copy spaces. We built out a template to start every project & use that to build the new space for each. Since the latest confluence updates it no longer works. It give me an error saying that it can't find the space. Which is the space where I have the Create Space Tree button I pushed to get the error. Please see screenshot.
It does create the space, but it's blank just like it would be if I started a normal confluence page.