Thanks for your replies!

@julian This will be the solution in this case.

@PitaJ Great, Thanks.

Currently I don't have time to join the development community of contributors. If I have in future, I will take a look into code to write a backup function also for the registration.

The software is really great, congratulations for the community.

And as suspected, it's about internal it restrictions of the user:

Is there anything I can do on my side?

Hello I have the same problem like several people with the message "Connection to NodeBB has been lost, attempting to reconnect.."

But it only happens for some users.

I assume that their browser doesn't support websockets. Because the forum we set up is used in the medical industry.

Usergroups:

• Governmentel Health Departments
• Hostpitals

So my questions:

• Are their any limitations for nodebb caused by Browser Versions or High Security Networks?
• Can nodebb run without sockets?

The configurations of nginx and nodebb should be correct. Because it's all setup according to the documentation.

Running on Ubuntu 18.04 LT min on Google Cloud.
It's working when I'm using it, and several other people. But not for some users.

NGINX:

server {

    server_name xxx.yyy.ch;

    location / {
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header Host $http_host;
        proxy_set_header X-NginX-Proxy true;

        proxy_pass http://127.0.0.1:4567;
        proxy_redirect off;

        # Socket.IO Support
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
    }

    listen 443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/xxx.yyy.ch/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/xxx.yyy.ch/privkey.pem; # managed by Certbot
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot

}
server {
    if ($host = xxx.yyy.ch) {
        return 301 https://$host$request_uri;
    } # managed by Certbot


    listen 80;

    server_name xxx.yyy.ch;
    return 404; # managed by Certbot


}

Config.json:

{
    "url": "https://xxx.yyy.ch",
    "secret": "bd50dacd-2089-840c-8704-6d3cfe8da3e4",
    "database": "mongo",
    "mongo": {
        "host": "127.0.0.1",
        "port": 27017,
        "username": "",
        "password": "",
        "database": "nodebb",
        "uri": "mongodb://admin:password@localhost:27017"
    }
}

@PitaJ thanks! That was the issue

When I run ./nodebb setup it runs into following error:

ber of issues. Please, upgrade your dependencies to the actual version of core-js@3.
npm ERR! code 128
npm ERR! Command failed: git clone --mirror -q git://github.com/thomaspark/bootswatch.git /root/.npm/_cacache/tmp/git-clone-2a6675ab/.git
npm ERR! fatal: could not create leading directories of '/root/.npm/_cacache/tmp/git-clone-2a6675ab/.git'
npm ERR!

npm ERR! A complete log of this run can be found in:
npm ERR! /root/.npm/_logs/2020-03-23T17_30_52_712Z-debug.log
Error installing dependencies!
message: Command failed: npm install --production
stdout: null
stderr: null
/home/samuel_schmid/nodebb/src/cli/package-install.js:52
throw e;
^

Error: Command failed: npm install --production