When I check "tail /var/log/nginx/error.log", i see notify that "could not build the server_names_hash, you should increase either server_names_hash_max_size: 512 or server_names_hash_bucket_size: 64" If you met reference, then add 2 the line:
server_names_hash_bucket_size 64;
server_names_hash_max_size 4112;
user www-data; worker_processes 4; pid /run/nginx.pid; events { worker_connections 768; } http { sendfile on; tcp_nopush on; tcp_nodelay on; keepalive_timeout 65; types_hash_max_size 2048; #Enable server_names_hash_bucket_size 64; server_names_hash_bucket_size 64; #Add server_names_hash_max_size 4112; server_names_hash_max_size 4112; include /etc/nginx/mime.types; default_type application/octet-stream; access_log /var/log/nginx/access.log; error_log /var/log/nginx/error.log; gzip on; gzip_disable "msie6"; include /etc/nginx/conf.d/*.conf; include /etc/nginx/sites-enabled/*; }