Description
If you get this error, WebSocket connection to 'wss://localhost:38732/' failed: Connection closed before receiving a handshake response
That MAY mean CurveCapture refuses to establish the connection since the session to which CurveCapture belongs is not the current logon session.
Background
If you get this error, WebSocket connection to 'wss://localhost:38732/' failed: Connection closed before receiving a handshake response
That MAY mean CurveCapture refuses to establish the connection since the session to which CurveCapture belongs is not the current logon session.
Steps to Follow
If the user log in through Remote Desktop and start CurveCapture, CurveCapture cannot find out the true logon session. And it will refuses all connection.So don't run CurveCapture through Remote Desktop.
WTSGetActiveConsoleSessionId() is used to find out the current logon session. But remote logon session doesn't attach to console session. 
Additional Information
If you get this error,
websocket handshake canceled
Try open https://localhost:38731 in chrome. If the page says certificate is revoked, thenopen chrome://flagslocate "Allow invalid certificates for resources loaded from localhost."click Enable right below itand then retry.
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