Energ statistic not defined

Hi all,

i have several Nous A1Z Zigbee sockets

All of them are working correctly except one in the energy dashboard.

I configured it a few days ago and it keeps saying “Statistic undefined” , “Entity unavailable” (sorry, it is in French in my UI)

Could you please help me to correct this issue :

That should mean that there was no value reported to the sensor yet. There are versions of this plug that dont report energy if I remember correctly.
You can use the riemann sum helper to get the energy.