Couple things to check.

1. Make sure url in config.json is same as the url you use to access the site.
2. Make sure your load balancer is configured properly for ssl.

Can you try in incognito, and see whether that works? If so, then you need to clear all of your session cookies on your main browser session.

@julian Same problem in incognito also.

@baris Point 1 is checked. I think the problem is with nginx(point 2). Sharing my nginx conf file because I could not figure out the problem.

upstream io_nodes {
    ip_hash;
    server 127.0.0.1:4567;
    server 127.0.0.1:4568;
}

server {

    server_name ekk.app;

    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header Host $http_host;
    proxy_set_header X-NginX-Proxy true;
    proxy_redirect off;

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

    gzip            on;
    gzip_min_length 1000;
    gzip_proxied    off;
    gzip_types      text/plain application/xml text/javascript application/javascript application/x-javascript text/css application/json;

    location [@nodebb](https://community.nodebb.org/user/nodebb) {
        proxy_pass http://io_nodes;
    }

    location ~ ^/assets/(.*) {
        root /home/debian/nodebb/;
        try_files /build/public/$1 /public/$1 [@nodebb](https://community.nodebb.org/user/nodebb);
    }

    location / {
        proxy_pass http://io_nodes;
    }

    listen 443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/ekk.app/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/ekk.app/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 ($host = ekk.app) {
        return 301 https://$host$request_uri;
    } # managed by Certbot


    listen 80;

    server_name ekk.app;
    return 404; # managed by Certbot


}

Try adding proxy_set_header X-Forwarded-Proto $scheme; after proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

@baris You are a wizard!!! That really solved the issue.

@bh4-tech Not really, it's from our docs here https://docs.nodebb.org/configuring/proxies/nginx/#basic-with-ssl

@baris Yeah noticed it now. Actually, I also setup the nginx configuration following nodebb docs, specially the one for utilising multiple(2) cores for nodebb, but somehow missed the line related to protocol. Thanks a lot again.