All Z-Wave devices offline

Read this thread: FAQ: Zwave repair not working (how to fix error messages)

Sounds like you have what are called ghost devices, you’ll need to correct them before repairs or routing work correctly. In short, create a generic ZWave device in the IDE with the same network ID as the unknown ‘ghost’ device, then go into newapp and Force Remove the new ghost device. It will clear the bad/ghost ZWave id from the hub’s registry THEN you can run a repair to fix your routes. Repeat until good.