Socket.io is not connecting when using /socket.io/?EIO=4&transport=websocket

[mahasheikhignite]

I am using nodejs backend and nodejs ejs frontend and my deployment server is apache. I have successfully run flow on localhost but when I move the code to production it gives me 400 bad request error on https://serverURL/socket.io/?EIO=4&transport=websocket but it send response on https://serverURL/socket.io/?EIO=4&transport=polling
0{"sid":"bpyERQ_HzRN51GyiAAAA","upgrades":["websocket"],"pingInterval":6000,"pingTimeout":3000,"maxPayload":1000000}
I also tries to add cors on server side but failed.

I am stuck can any one please help. Thanks in advance.

[darrachequesne]

Hi! Please check the documentation for apache: https://socket.io/docs/v4/reverse-proxy/#apache-httpd