Shift Lock Link
WARNING: This page is about a different car, the 2015 Mitsubishi Lancer. However, it is still accessible from the selected car via links, so may be relevant.
Check each part for damage and disengagement.
Check that the lock lever smoothly moves in the direction of arrow B in the illustration when the shift lock solenoid plunger is pressed in the direction of arrow A, and smoothly moves back to the original position when the plunger is released.