Error 0x83760005

Value: -2089418747 | 0x83760005 | 2205548549

What does it mean ?

E_PROTOCOL_VERSION_NOT_SUPPORTED  
Incorrect protocol version.
Value: 5 | 0x0005 | 0b0000000000000101

Where does it come from ?

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

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