I registered my DNS on Cloudflare and generated both PEM and key SSL certificates. I assigned the certificate to the Nginx web server, but it is not working.
NGINX CONF

events {}

http {
    server {
        listen 80;
        listen 443 ssl;

        #ssl_certificate /etc/nginx/certs/aspnetapp.pfx;
        #ssl_certificate_key /etc/nginx/certs/aspnetapp.pfx;
        ssl    on;

        ssl_certificate /etc/nginx/ssl/tadehb.com.crt;
        ssl_certificate_key /etc/nginx/ssl/tadehb.com.key;
        ssl_client_certificate optional;
        ssl_protocols SSLv3 TLSv1.1 TLSv1.2;
        location / {
            root /usr/share/nginx/html;
            index index.html index.htm;
            try_files $uri $uri/ /index.html;
        }
    }
}