Re : Error from protection key

Hello Pentelis,

Thanks for raising the concern.

From the shared description, we assume that you are using the latest released version of "Sentinel System Drivers" v7.5.4.

Please correct if the above observation is not correct.

Kindly confirm a few details to check the cause behind the issue :

1- Confirm if the key is visible under system information ( available under location /applications/utilities/)
2- Check if the issue pesists on all the ports.
3- Check if the issue persists with any other mac machine or any other version before "El Captain". 

Looking forward for the response.

Best regards,
Parth