Installing Drupal

Hello Drupal pros.

I am actually trying to automate the installation of Drupal into Debian, and I thought my work would be useful to the community.

This is done using Ansible and Drush.

Once installed, Drupal is served by Apache, with mod_security, clean URLs and rpaf.

Everything is proxied through nginx.

AppArmor is deployed as well, with nginx and Apache in enforce mode.

The database is built automatically, with PostgreSQL.

I installed the site using EC2 AWS Ubuntu 14.04. This site have a live version. I am only uploading a duplicate version to experiment.

Now the problem is when I use the database from the live to my duplicate site, it results into HTTP ERROR 500.

But when I use the database from basic installation, it loads the default design of a typical drupal site.

Why is this happening? Is there an error from the server?

Why is there no .htaccess file in the  8.6.10 .zip installation files? 
I installed from a cpanel script to get the D8 file and then all was good.

But where is it?

I am in the process of setting a website up in Drupal and I am using the Layout Builder. I was about to move ahead with it for the production site but my main concern is the fact that the I get the warning

"EXPERIMENTAL MODULES ENABLED Experimental modules found: Layout Builder. Experimental modules are provided for testing purposes only. Use at your own risk."

Hello guys!

I successfully installed my site in AWS EC2. I can see the interface. But the links are broken. Whenever I click any content or links in the website, it directs me to:

-------------------------------------------------------------------------------------------------------------------------------------------------------

404 Not Found

Not Found

The requested URL /(directory)/(nodes) was not found on this server.

Apache/2.4.29 (Ubuntu) Server at (Server IP) Port 80

I have been away from Drupal installs for a while and need a reminder on what I use rather than localhost when installing.  The default host is localhost, but there is an Advanced tab.  What do I use in place of localhost?