Few apps not working after firmware installation

[Ravi_galaxy]

Hi Guys,

I had to install Android 9 on my samsung galaxy note 8 SM-950, after I accidentally erased the rom.

The installation was successful but few apps like samsung health and samsung pay is not working.

I am getting error message "some unauthorised changes has been made to your device".

Official updates are not available for this phone, I view contacted with service center they said company stopped updating this model.

Please suggest how to resolve this issue.

Thanks in advance 

[Sid_Karna]

I think you tripped the knox security by rooting the device.

[Ravi_galaxy]

How I can fix it