Hi Skyler @skyblaze ,
That works perfectly fine (also on your file).
You might not be able to see the Active Vertex (getting a different color), because at the corners there are 2 Vertices ‘on top of each other’, but one of those still becomes Active when you SHIFT+Select it and the Scaling works (you coould also try Edge Select Mode and make an Edge Active, that should be easier to see).
