Error 0x8009481A

Value: -2146875366 | 0x8009481A | 2148091930

What does it mean ?

CERTSRV_E_KEY_ATTESTATION  
The request does not support private key attestation as defined in the certificate template.
Value: 18458 | 0x481A | 0b0100100000011010

Where does it come from ?

FACILITY_SSPI  
Used for status code returned by Security Support Provider Interface (SSPI)
Value: 9 | 0x009 | 0b00001001

StackOverflow

Other Errors for FACILITY_SSPI