Device Losing Network - Error invalid group cipher

Comes here often

Device Losing Network - Error invalid group cipher

I have a card terminal that is constantly losing network and getting invalid group cipher as the error. as well as this error 

auth_mode='wpa2-psk' reassoc='1' error_code='41' radio='1' vap='0' channel='161' rssi='19'


Seems to only be card terminals and no other devices 


Any help would be much appreciated 



Kind of a big deal
Kind of a big deal

Could be some kind of driver issue. Did you check for updates  of the terminal? Does the terminal provider has a document which wifi settings/signal are required?


Just 1 terminal? Or all card terminals?

Did it work before?  was there any update on your wifi or terminal?

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