Forgive me if you’ve tried this already, but you need to tell the lock to look for and connect to your ST z-wave network - it won’t do that automatically without you telling it to,
The best instructions are the ones that came in the little box that the green z-wave module was packaged in (all within the packaging for the lock in general), but IIRC, network-join instructions are also provided in the overall lock instructions sheet too.
You need to install the green z-wave module with lock batteries removed, and then pop in batteries in.
Next, enter your Master Code… IIRC, the network-join menu option is “7” (then settings button), and then option “1” (then settings button) to actually get the lock begin searching for your network.
If the network join is a success, the lock will audibly tell you. If the join is unsuccessful, the lock will time out after a minute or so.
In the latter case, the lock is probably just too far away from the hub or the nearest repeater. You can try adding a z-wave device (outlet, bulb, etc) somewhere to act as a repeater, and then do a z-wave network refresh - that will probably help.
One of my 3 Yale locks is out on my detached garage, but it turns out that one is simply too far away from my house/network, so I’m out of luck connecting that one (no big deal). My other 2 in my house connected easily and both work great.