bad handshake error while connecting with wstunnel server

I have requirement to use https://github.com/mhzed/wstunnel server and connect chisel client with it. wstunnel server is running on localhost:8081, getting below error when trying to connect

chisel client 127.0.0.1:8081 127.0.0.1:8086:127.0.0.1:22

2022/02/05 15:29:32 client: Connecting to ws://127.0.0.1:8081
2022/02/05 15:29:32 client: tun: proxy#127.0.0.1:8086=>22: Listening
2022/02/05 15:29:32 client: Connection error: websocket: bad handshake
2022/02/05 15:29:32 client: Retrying in 100ms...
2022/02/05 15:29:32 client: Connection error: websocket: bad handshake (Attempt: 1)
2022/02/05 15:29:32 client: Retrying in 200ms...
2022/02/05 15:29:32 client: Connection error: websocket: bad handshake (Attempt: 2)
2022/02/05 15:29:32 client: Retrying in 400ms...
2022/02/05 15:29:32 client: Connection error: websocket: bad handshake (Attempt: 3)
2022/02/05 15:29:32 client: Retrying in 800ms...
2022/02/05 15:29:33 client: Connection error: websocket: bad handshake (Attempt: 4)
2022/02/05 15:29:33 client: Retrying in 1.6s...