Cannot upgrade from polling to websocket transport (Nestjs + Socket IO protocol)

[lunard]

Hello to all.
First thanks for this useful library!
I'm using Nestjs with the Socket IO Gateway.
No problem to open and use the Websocket using Postman.

The problem is that the WS Arduino library start a handshake using the polling transport and try then to switch to the websocket transport, but the server (socket io Node library) claims errors:

Someone was able to use Nestjs and SocketIO as backend ?

_Nginx:
46.18.28.242 - - [02/Jul/2022:09:13:48 +0000] "GET /api/ws/?EIO=3&transport=polling HTTP/1.1" 200 100 "-" "arduino-WebSocket-Client"
46.18.28.242 - - [02/Jul/2022:09:13:59 +0000] "GET /api/ws/?EIO=3&transport=websocket&sid=qose5r1T7totaQZHAAAp HTTP/1.1" 101 2 "-" "arduino-WebSocket-Client"

Node log:
engine:socket client did not complete upgrade - closing transport +1s
engine:transport readyState updated from open to closing (websocket) +1s_

[lunard]

My fault: I had to use the SocketIOclient