404 default error page Nginx

Hi all,
I have 1 question:
My default example vhost in ispconfig 3.1 with nginx vm is this:
server {
listen *:80;

listen *:443 ssl;
ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
ssl_certificate /var/www/clients/client1/web1/ssl/001-default.studiopyxis.it-le.crt;
ssl_certificate_key /var/www/clients/client1/web1/ssl/001-default.studiopyxis.it-le.key;

server_name 001-default.studiopyxis.it www.001-default.studiopyxis.it;

root /var/www/001-default.studiopyxis.it/web/;



index index.html index.htm index.php index.cgi index.pl index.xhtml;



error_page 400 /error/400.html;
error_page 401 /error/401.html;
error_page 403 /error/403.html;
error_page 404 /error/404.html;
error_page 405 /error/405.html;
error_page 500 /error/500.html;
error_page 502 /error/502.html;
error_page 503 /error/503.html;
recursive_error_pages on;
location = /error/400.html {

internal;
}
location = /error/401.html {

internal;
}
location = /error/403.html {

internal;
}
location = /error/404.html {

internal;
}
location = /error/405.html {

internal;
}
location = /error/500.html {

internal;
}
location = /error/502.html {

internal;
}
location = /error/503.html {

internal;
}

error_log /var/log/ispconfig/httpd/001-default.studiopyxis.it/error.log;
access_log /var/log/ispconfig/httpd/001-default.studiopyxis.it/access.log combined;

location ~ /\. {
deny all;
}

location ^~ /.well-known/acme-challenge/ {
access_log off;
log_not_found off;
root /usr/local/ispconfig/interface/acme/;
autoindex off;
index index.html;
try_files $uri $uri/ =404;
}

location = /favicon.ico {
log_not_found off;
access_log off;
expires max;
add_header Cache-Control "public, must-revalidate, proxy-revalidate";
}

location = /robots.txt {
allow all;
log_not_found off;
access_log off;
}

location /stats/ {

index index.html index.php;
auth_basic "Members Only";
auth_basic_user_file /var/www/clients/client1/web1/web//stats/.htpasswd_stats;
}

location ^~ /awstats-icon {
alias /usr/share/awstats/icon;
}

location ~ \.php$ {
try_files /bd481e914cb5480c90cc27b792938fac.htm @php;
}

location @php {
try_files $uri =404;
include /etc/nginx/fastcgi_params;
fastcgi_pass unix:/var/lib/php7.2-fpm/web1.sock;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_intercept_errors on;
}

location / {
try_files $uri $uri/ /index.php?$args;
}
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How can I edit it for solve the problem of 404 error page default that responds everytime I go to an undesired url??
With apache my wordpress websites go to 404 error page of the theme, but with nginx all the permalinks that no exist go to default 404..for example my /phpmyadmin page..

thanks

 

any idea??

 

very thanks