Why is the lid lock light flashing on Whirlpool washer?

Why is the lid lock light flashing on Whirlpool washer?

Lid Lock Light Flashing: The Lid Lock Light will flash if Lid Lock has not moved into the Lock Position, the Lock Motor can not be powered, or the Lid is not closed completely due to interference. Some models will lock immediately, while others will not lock until after the wash cycle has started.