I neеd hеlp with a WordPress project

i need more info but i think you have rewrite issue.
use this in nginx config:

location /
{
     try_files $uri $uri/ /index.php?$args;
}

rewrite /wp-admin$ $scheme://$host$uri/ permanent;

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)