Error 0x83750007

Value: -2089484281 | 0x83750007 | 2205483015

What does it mean ?

WEB_E_INVALID_JSON_STRING  
Invalid JSON string.
Value: 7 | 0x0007 | 0b0000000000000111

Where does it come from ?

FACILITY_WEB  
HTTP(s) protocol
Value: 885 | 0x375 | 0b1101110101

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