URL rewriting is not properly configured on your server.

Hi! Can you post your nginx server block config? You will need to add something like this in order to enable URL rewriting in nginx:

server {
    ...

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

    ...
}

You can always refer to CakePHP’s documentation for more information on how to set up URL Rewriting and example configs.