Hi, I have been using expressions for years, and today I got a very weird error that I have never come across. It seems to me like a bug. I simply want to link a layer’s opacity to the opacity of another layer, as you can see in the image attached. I have tried referencing the layer by index and by name, but both give me the error. If I link it to the opacity of another layer, it works without problems. I only get the error when I link it to the specific shape layer. If I move the layers to other indexes, the issue remains.