I have 3 domains setup, 1 is irrelevant, and 1 is new. The problem is that it redirects, I think, to my other domain. I say I think because Firefox/Chrome give an error due to mismatch to name provided in the certificate: it uses the name of my other domain. Safari on the other hand displays the default Nginx page.

Check this:

https://check-your-website.server-daten.de/?q=gleep.app

It shows that the certificate and even screenshots come from my other domain, looxapp.gr

I have read a million other topics like this but I still can’t solve it.

gleep.app:

server {

        root /gleep/admin/build;
        index index.html index.htm index.nginx-debian.html;

        server_name www.gleep.app gleep.app;

        location / {
        try_files $uri $uri/ /index.html;
#               try_files $uri $uri/ =404;
#         proxy_pass http://localhost:8085;
         proxy_http_version 1.1;
         proxy_set_header Upgrade $http_upgrade;
         proxy_set_header Connection 'upgrade';
         proxy_set_header Host $host;
         proxy_cache_bypass $http_upgrade;
       }
    listen [::]:80;


    listen [::]:443 ssl ipv6only=on;  # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/gleep.app/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/gleep.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


}

looxapp.gr: (bar and admin subdomains don’t work but that’s ok)

server {

        root /looxbrowser/build;
        index index.html index.htm index.nginx-debian.html;

        server_name looxapp.gr www.looxapp.gr;

        location / {
    try_files $uri $uri/ /index.html;
                #try_files $uri $uri/ =404;
#         proxy_pass http://localhost:8083;
         proxy_http_version 1.1;
         proxy_set_header Upgrade $http_upgrade;
         proxy_set_header Connection 'upgrade';
         proxy_set_header Host $host;
         proxy_cache_bypass $http_upgrade;
        }

    listen [::]:443 ssl; # managed by Certbot
    listen 443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/looxapp.gr/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/looxapp.gr/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 {

    root /looxbar/build;
    index index.html index.html index.nginx-debian.html;

    server_name bar.looxapp.gr;

    location / {
        try_files $uri $uri/ =404;
        proxy_pass http://localhost:8083;
        proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection 'upgrade';
    proxy_set_header Host $host;
    proxy_cache_bypass $http_upgrade;

    }

    listen [::]:443 ssl; # managed by Certbot
    listen 443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/looxapp.gr/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/looxapp.gr/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 {
    root /admin/build/;
    index index.html index.html index.nginx-debian.html;

    server_name admin.looxapp.gr;
    location / {
        try_files $uri $uri/ /index.html;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection 'upgrade';
        proxy_set_header Host $host;
        proxy_cache_bypass $http_upgrade;

    }


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


    if ($host = looxapp.gr) {
        return 301 https://$host$request_uri;
    } # managed by Certbot


    listen 80;  
        listen [::]:80;

        server_name looxapp.gr www.looxapp.gr;
    return 404; # managed by Certbot




}

server {
    if ($host = bar.looxapp.gr) {
        return 301 https://$host$request_uri;
    } # managed by Certbot


    listen 80;
    listen [::]:80;

    server_name bar.looxapp.gr;
    return 404; # managed by Certbot


}

server {
    if ($host = admin.looxapp.gr) {
        return 301 https://$host$request_uri;
    } # managed by Certbot



    server_name admin.looxapp.gr;
    listen 80;
    return 404; # managed by Certbot


}