Сan't connect to socket

When I try to connect, I get this error:

02.11.2018 6:07:15|Warn |Logger.set_File|The current path to the log file has been changed to D:\log.txt.
02.11.2018 6:07:16|Debug|WebSocket.sendHttpRequest|A request to the server:
                         GET /ds/v3 HTTP/1.1
                         User-Agent: websocket-sharp/1.0
                         Host: olymptrade.com
                         Upgrade: websocket
                         Connection: Upgrade
                         Sec-WebSocket-Key: IFahJDOkh4fERzmvKrJbng==
                         Sec-WebSocket-Version: 13
02.11.2018 6:07:16|Debug|WebSocket.sendHttpRequest|A response to this request:
                         HTTP/1.1 101 Switching Protocols
                         Upgrade: websocket
                         Connection: Upgrade
                         Sec-WebSocket-Accept: hnOP3GqPYSZIbpBDPaNxMx9hUZA=
02.11.2018 6:07:16|Trace|WebSocket.close|Begin closing the connection.
02.11.2018 6:07:16|Debug|WebSocket.closeHandshake|Was clean?: True
                           sent: True
                           received: True
02.11.2018 6:07:16|Trace|WebSocket.close|End closing the connection.

Socket address: wss://olymptrade.com/ds/v2
Data to send: [{"t":2,"e":4,"uuid":"JNZB0IF2U34GIWBYJNS","d":[{"p":"XMRUSD","tf":1}]}]

Start with the WebSocket.sendHttpRequest and WebSocket.close log entries, comparing the requested wss://olymptrade.com/ds/v2 address with the logged /ds/v3 handshake. Reproduce the connection and determine why it closes after the successful handshake; done means the reported endpoint can connect and send the supplied data, with a regression check if the project provides one.