Error 0x803D001D

Value: -2143485923 | 0x803D001D | 2151481373

What does it mean ?

WS_E_SERVER_REQUIRES_DIGEST_AUTH  
The remote endpoint requires HTTP authentication scheme 'digest'.
Value: 29 | 0x001D | 0b0000000000011101

Where does it come from ?

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

Other Errors for FACILITY_WEBSERVICES