Error 0x801901F9

Value: -2145844743 | 0x801901F9 | 2149122553

What does it mean ?

HTTP_E_STATUS_VERSION_NOT_SUP  
Version not supported (505).
Value: 505 | 0x01F9 | 0b0000000111111001

Where does it come from ?

FACILITY_HTTP  
HTTP support
Value: 25 | 0x019 | 0b00011001

Other Errors for FACILITY_HTTP