I try to follow the tutorial "Headshot Plug-in Side reference Approaches" and I can not import an image to create an image layer in my scene. I try to drag a drop the image as in the tutorial but I have a red panel. Is there a particlular configuration to make this approach ?
Thank you in advance for yours answers.

I had that problem too. I rewatched the part in the video and he says to "right click and drag the image." That worked.