2 point sliding door lock and handle

Thanks for posting. Try flipping the mortise lock 'manually' with a slotted screwdriver. If the lock doesn't budge, then its definitely broken and needs to be replaced. See our 82-265. If the mortise lock is able to flip, then the problem is with your handle set. See our 82-086. Let us know what you think.

It sounds to me then it would be best to replace the mortise lock. Let us know if you need anything else, and thanks for reaching out.