Its some sort of issue with the firmware updater app and devices paired with S2. I have documented it extensively in the beta group. No idea if it will ever be fixed. The custom driver version works but you need to have an URL to the file or save it on the hub. There are some tips near the bottom of the thread. [RELEASE] Z-Wave Firmware Updater
You will also need to use the BINARY version of the updater (not linked on main post): hubitat/zwaveBinaryUpdater.groovy at master 路 djdizzyd/hubitat 路 GitHub
