PSU Control Tapo has stopped working

Hi,
I have a TP-Link Tapo P100. All worked well and I have turned it on and off many times with the Octoprint 'Flash' icon.......until today.
I have not used the printer for some time and today I cannot turn it on and off via the Tapo switch.
I can operate the switch from the Tapo app.
I have removed the PSU Control and PSU Control Tapo plugins, re-installed and re-configured them.
The flash/lightning bolt is grey and remains grey, when clicked on.

Whilst I have not used my installation for some time I do login to Octoprint and do updates.

Where next ?

Andy

Did your Tapo firmware update recently? In your device configuration do you have the option enabled to allow 3rd party compatibility (question 2)?

Aha, thanks. I thought the 3rd party setting was for the device but followed the link you provided and found it under Tapo --> Me.
Turned it on an Voila it works again.

Many thanks