Error 0x80090309

Value: -2146893047 | 0x80090309 | 2148074249

What does it mean ?

SEC_E_CANNOT_PACK  
The security package is not able to marshall the logon buffer, so the logon attempt has failed
Value: 777 | 0x0309 | 0b0000001100001001

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