Happy to assist! It looks like the duplicate fell off and is no longer showing up in Alarm.com. If you are still seeing this, you will want to log out of your Alarm.com account then log back in.
Additionally, commands to re-sync Z-Wave devices have been run and the wall outlet appears to be connected at this time. Can you confirm?
Was a Z-Wave Network Rediscovery Run after learning in the device? If not, do so now. Steps on how to do this are found below:
The LED light on the outlet is always off too.
Per the manual, the light is on when the load is on, by default. If you send remote commands at this time, does the switch turn on? If so, does the light turn on?
If the device is still no longer working after the Re-Sync Commands, run the network rediscovery and try again.
Should the device fail to work after that, then you may need remove the device from programming (method found above) re pair then run a network rediscovery. After doing so, any change?