Nginx is not responding to domain name

I registered a domain name at namecheap (let’s say is zxcvb.me). Then I tried to configure a react app in Nginx. This is my config, called zxcvb.me

server {
        listen 80;
        listen [::]:80;

        root /home/ubuntu/portfolio/react/build;
        # Add index.php to the list if you are using PHP
        index index.html index.htm index.nginx-debian.html;

        server_name zxcvb.me www.zxcvb.me;

        location / {
                try_files $uri /index.html;
        }

under /etc/nginx/sites-available. Then I used sudo ln -s /etc/nginx/sites-available/zxcvb.me /etc/nginx/sites-enabled/ then sudo systemctl restart nginx
But the website just won’t load. Anyone knows why? (Running on Ubuntu)