Error when supervisor opens interview on the server

Deployment
1

The Statistical Office has installed a local server with the latest version 22.06.10 (build 32984).
Everything works fine, but when a supervisor or Headquarters user opens an interview on the server, it opens it and after one second only shows “error”.

This is in the browser log:

CBGC error
CBGC error1663×223 32.7 KB

Any idea what could have gone wrong during server installation?

Thank you

2

Maybe this is more readable:

image
image923×208 24.8 KB

3

Check the web sockets as described here:

4

Thank you @sergiy, the IT department now reports having fixed the problem.
Thanks again for the speedy reaction.

5

Sure.

Please encourage the specialist to share the steps to rectify this problem that they find successful.

6

Maria Onea from the IT department sent me the following explanation:

The web application is accessed from the Internet through a reverse proxy based on ”nginx”. It has been discovered that ”nginx” was not configured to forward WebSocket connections.

Solution:

The following lines were added to ”nginx” configuration file:

proxy_http_version 1.1;
proxy_set_header Host $host;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "Upgrade";

After reloading ”nginx” the errors disappeared and the application was accessed normally.

References:

7

Dear Klaus,

thank you very much for including this useful description.

Best, Sergiy

8