2010 CRV Rear Driver's Side Door Not Locking

My 2010 Honda CRV’s rear driver’s side door stopped locking. When the autolock kicks on while driving, there is a loud buzzing sound when the doors try to lock. All doors lock except this one. The same thing happens if I try to hit the lock button while parked, and it doesn’t budge even a little if I manually push the lock on the door itself. I wasn’t super worried about it until someone “broke into” my car yesterday after finding that door unlocked. Any suggestions?

the door lock actuator probably needs to be replaced.

How To Replace The Door Lock Actuator 2007-2011 Honda CRV - Bing video