Error 0x80040D59

Value: -2147218087 | 0x80040D59 | 2147749209

What does it mean ?

GTHR_E_INVALID_START_PAGE_HOST  
The specification for the content source is missing the host name. Specify a valid URL.
Value: 3417 | 0x0D59 | 0b0000110101011001

Where does it come from ?

FACILITY_ITF  
COM/OLE Interface management. FACILITY_ITF is designated for user-defined error codes returned from interface methods
Value: 4 | 0x004 | 0b00000100

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