The following information will show how to adjust the leg down on your driver side lift ramp to allow for roller clearance. You do not need to remove the driver lift ramp in order to make this adjustment.
Using pliers, grab the entire leg as shown in the photo below. Bend the leg down 10 degree increments at a time. Operate the cover after each increment and stop bending the leg as soon as the cab end roller clears the leg.