ormin example chat - websocket failed

[domogled]

Hello,

Im run ormin examples.
    
    
    ./examples/chat/server
    [Warning] WS negotiation failed: the only supported sec-websocket-version 
is 13
    [Warning] WS negotiation failed: the only supported sec-websocket-version 
is 13
    
    
    Run
    
    
    http GET http://localhost:8080/
    HTTP/1.1 400 Bad Request
    Content-Length: 76
    
    WebSocket negotiation failed: the only supported sec-websocket-version is 13
    
    
    Run

Where is problem?

thanks

Živoslav