Thanks for your answer, I'll specify it better:

Config Work Fine:

[domain1.conf]:

server {
listen [::]:80;
root /home/domain1/public_html;
index index.php index.html index.htm;
server_name domain1 www.domain1;
location ~ \.php$ {
fastcgi_pass [::]:9056;
}
}

[subdomain.domain1.conf]:

server {
listen 80;
root /home/domain1/public_html/subdomain;
index index.php index.html index.htm;
server_name subdomain.domain1 www.subdomain.domain1;
location ~ \.php$ {
fastcgi_pass 127.0.0.1:9056;
}
}

Config No Work :


[domain1.conf]:

server {
listen [::]:80;
root /home/domain1/public_html;
index index.php index.html index.htm;
server_name domain1 www.domain1;
location ~ \.php$ {
fastcgi_pass [::]:9056;
}
}

[subdomain.domain1.conf]:

server {
listen [::]:80;
root /home/domain1/public_html/subdomain;
index index.php index.html index.htm;
server_name subdomain.domain1 www.subdomain.domain1;
location ~ \.php$ {
fastcgi_pass [::]:9056;
}
}

The error happens when Listen and fastcgi_pass have the same port address in both domains,


Thks,