Redmine

Hi,
I've installed Redmine using the guide at the link: [[https://linuxize.com/post/how-to-install-and-configure-redmine-on-ubuntu-18-04/]] on Ubuntu with Nginx.

But I have not configured a SSL certificate, so my Nginx server block file is:

server {
    listen 80;
    server_name ubuntu.redmine;

    root /opt/redmine/public;

    # log files
    access_log /var/log/nginx/ubuntu.redmine.access.log;
    error_log /var/log/nginx/ubuntu.redmine.error.log;

    passenger_enabled on;
    passenger_min_instances 1;
    client_max_body_size 10m;
}

When I try to access to http://ubuntu.redmine I have the following error message:

+Internal error

An error occurred on the page you were trying to access.
If you continue to experience problems please contact your Redmine administrator for assistance.

If you are the Redmine administrator, check your log files for details about the error.+

No log file is generated in the path /var/log/nginx/

Can anybody help me please???