Error 0x83760001

Value: -2089418751 | 0x83760001 | 2205548545

What does it mean ?

E_INVALID_PROTOCOL_OPERATION  
Invalid operation performed by the protocol.
Value: 1 | 0x0001 | 0b0000000000000001

Where does it come from ?

FACILITY_WEB_SOCKET  
WebSocket protocol
Value: 886 | 0x376 | 0b1101110110

StackOverflow

Other Errors for FACILITY_WEB_SOCKET