Change the X offset of the background

I was looking at a tutorial and it told me to change the X offset of the background that makes it look like it is moving to the left. When I go to do this, there is a image X offset but asks for an object, which whatever I put in says the object doesn’t exist and cannot be used. I do this without any condition since I want it to be done throughout the entire game.

The offset action is compatible with Tiled Sprite Object: