Failed to validate the product key error
I have 12 samsung galaxy A10 (SM-A105F) smartphones. They are identical. Their knox versions, software informations and other specialities are the same. Our application can work on 9 of the all devices properly. But for 3 of them, some features do not work. (I can not turn on/off mobile tethering and wifi)
On working phones, I see "Knox licence validation completed succesfully" notification when I start the app
On non-working phones, there is "Failed to validate the product key" error. I restored fabric settings and tried again, the problem was not solved. Then we controlled logs. It seems the error coming from SDK messages.
What can be the reason of this problem? And how can we solve it?