It sounds like you may be using an old custom device handler for your lock. There were some changes deployed to the platform/hub firmware last week which required an update to custom DTH’s. You can either:
Switch your lock to use the standard ST “Z-Wave Lock” DTH, or
If you want to continue using the custom device handler, update to the version that was released a few months ago in anticipating of this update.
You may also want to check if you’ve got notifications enabled: