OK being an electrician I look at it this way!
- Does the regular open close push button work?
- If yes check the two wires going to the same to contacts on the garage door that the button is going to and make sure your remote garage door unit is connected right and the wires are intact.
- If that is good make sure there is power at your Z-Wave or zigbee control unit. I have seen where the powwer wires become disconnected.
- Now that you have done all that install a Z-Wave repeater as it could be the signal isn’t strong enougth to reach the control unit.