Error 0x80190197

Value: -2145844841 | 0x80190197 | 2149122455

What does it mean ?

HTTP_E_STATUS_PROXY_AUTH_REQ  
Proxy authentication required (407).
Value: 407 | 0x0197 | 0b0000000110010111

Where does it come from ?

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

Other Errors for FACILITY_HTTP