Error 0x803D0015

Value: -2143485931 | 0x803D0015 | 2151481365

What does it mean ?

WS_E_PROXY_FAILURE  
The HTTP proxy server could not process the request.
Value: 21 | 0x0015 | 0b0000000000010101

Where does it come from ?

FACILITY_WEBSERVICES  
Web Services
Value: 61 | 0x03D | 0b00111101

Other Errors for FACILITY_WEBSERVICES