Error 0x801901F4

Value: -2145844748 | 0x801901F4 | 2149122548

What does it mean ?

HTTP_E_STATUS_SERVER_ERROR  
Internal server error (500).
Value: 500 | 0x01F4 | 0b0000000111110100

Where does it come from ?

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

Other Errors for FACILITY_HTTP