SocketIO Worker error: {"type":"TransportError","description":400}

Hi, I have this error when execute the websocket-bench...

_> websocket-bench -a 40 -c 10 -p websockets -t socket.io 'https://netbar.com:9876' -v

Launch bench with 40 total connection, 10 concurent connection
0 message(s) send by client
1 worker(s)
WS server : socket.io
Benchmark Options {"generatorFile":"/usr/local/lib/node_modules/websocket-bench/lib/generator.js","type":"socket.io","transport":"websockets","verbose":true}
trying : 10 ...
SocketIO Worker error: {"type":"TransportError","description":400}
SocketIO Worker error: {"type":"TransportError","description":400}
....

[MihaelIsaev]

The same here

[jiaguolin]

+1

[jiaguolin]

In the following ways to solve

const socket = io('http://hjguang.emicmh.com/5b0663f07a75d800207ea6c4', { transports: ['websocket'] });

But some of my customer's browser does not support 'websocket', all the way I must be compatible with the 'polling'
socket-io@2.1.0
socket.io-client@2.1.0