That solution only works if you’re using a custom device handler like this one.
If you’re using the stock handler that comes with ST then most likely your lock and hub are having pairing issues. Try this:
- Exclude your lock using the ST app (this is one reason locks won’t pair, they need to be excluded first, see your lock manual)
- Reset the lock (see lock manual)
- Reboot the hub (power cycle it if you don’t know how to reboot)
- Bring the lock within 5ft of the hub and then try pairing it