V13 socket.io 404 not found

I have installed erpnext V13 on AWS EC2 and I am trying to add an email domain but it is always giving me a “Not Saved” without any log.

I checked the chrome console and I found the below issue once I am loading the page.

Failed to load resource: the server responded with a status of 404 (NOT FOUND)

I tried to npm install socketio but nothing has changed. Even I did bench update but nothing has changed also.

Do you know how to fix that?

Same issue here. Fresh v13 install on Azure