When the washer is control locked you get Loc on display. In your case the washer is probably stuck because there is water inside the drum.
Try first disconnecting power for two minutes by either tripping the circuit breaker or by disconnecting the power cord. After reconnecting run a short cycle (e.g. spin only).
If that does not work the water must be removed through the drain filter in front of the machine. In that case do the following:
Remove the trim panel at the base of the machine.
Locate the drain filter access at one side.
Remove drain filter cap.
Collect water using containers (have them ready, a lot of water will flow out).
Put back cap and trim and reapply power.
See the picture below showing how to remove the panel at the base of the machine:
Here the drain filter:
That is usually enough to solve the problem. If that does not work the machine must be partly disassembled to reach the inside of door lock pulling the emergency access cable. The emergency access can be reached removing the drain filter or removing the top panel. Power must be off and the operation should be done by a technician.
Disconnecting power and emptying the water through the drain filter is usually enough to unlock the door and to put the machine back at work.