Hello,

I am trying to build a new layout in Panels. When I open the layout designer and try to add a new row or column (or click any of the links, really) I get a popup that says "The requested page could not be found."

I tried upgrading from Panels 7.x-3.3 to 7.x-3.4, but I still get the above error. I'm pretty sure it worked before! Any ideas?