im trying to install a owncloud in a nginx server. So far i managed somehow to actually start the installation of owncloud but i cant make it further. i got this error and i have no idea what it means

[error] 70187#70187: *13 FastCGI sent in stderr: "PHP message: PHP Warning:  fopen(/var/www/html/owncloud/config/config.php): failed to open stream: Permission denied in /var/www/html/owncloud/lib/private/Config.php on line 239PHP message: PHP Warning:  flock() expects parameter 1 to be resource, bool given in /var/www/html/owncloud/lib/private/Config.php on line 249PHP message: PHP Warning:  file_put_contents(/var/www/html/owncloud/data/crash-2024-06-06.log): failed to open stream: No such file or directory in /var/www/html/owncloud/lib/kernel.php on line 1038PHP message: PHP Warning:  file_put_contents(/var/www/html/owncloud/data/crash-2024-06-06.log): failed to open stream: No such file or directory in /var/www/html/owncloud/lib/kernel.php on line 1038" while reading response header from upstream, client: 127.0.0.1, server: , request: "POST /index.php HTTP/1.1", upstream: "fastcgi://unix:/var/run/php-fpm/www.sock:", host: "localhost"

My nginx.conf file is this one

user apache;

http{
        types_hash_max_size 4096;
        include mime.types;
        server{
                listen 80;
                root /var/www/html/owncloud;
                index index.php;
                location ~ .php$ {
                        autoindex on;
                        include fastcgi.conf;
                        fastcgi_pass unix:/var/run/php-fpm/www.sock;
                                }
        }
}
events{}

i tried changing users and permisions but i have no idea what this error means