I get 502 Bad Gateway with nginx example config file about z-nomp HOT 5 OPEN

root /var/www/zcash;

index index.html index.htm index.nginx-debian.html;

location / {
	try_files $uri $uri/ =404;
}

location ~ .$ {
	proxy_set_header X-Real-IP $remote_addr;
	proxy_set_header X-Forwarded-For $remote_addr;
	proxy_set_header Host $host;
	proxy_pass http://127.0.0.1:8188;
}

 listen 443 ssl http2;
server_name zec.mychainpools.com www.zec.mychainpools.com;
ssl_certificate       path/fullchain.pem; # managed by Certbot
ssl_certificate_key  path/privkey.pem; # managed by Certbot
ssl_trusted_certificate / path/fullchain.pem;
include /etc/nginx/snippets/ssl-params.conf;


root /var/www/zcash;


index index.html index.htm index.nginx-debian.html;


location / {


	try_files $uri $uri/ =404;

   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_read_timeout 5m;
    proxy_connect_timeout 5m;
    proxy_pass http://127.0.0.1:8188;
   
	
 }