I was creating a little project Inside Construct, and I've hit a wall. Here's what I did.
I created an event that sets a foreground object to 40% opacity when overlapping the player object.
Once I attempted to run the layout, I was greeted with a "Invalid Texture Was Referenced" error. It said that it was a bug that should be reported, so voila.
.cap file is attached.
EDIT: I also had recently changed the width of my layout from 320X240 to 1000x240, prior attempting to run it.