external domain shows php login screen or 404

Hi,

We followed the tutorial written in the installation guide and on other websites.

However when we type the external domain in the browser it shows a page which says:

PHPMyAdmin
apache-status

We installed the plugin, uploaded sunrise.php and configured wp_config.php. Then we put our servers IP in the domain mapping settings. After that we logged into the external domain name and put the A record to our server.

Lets say our multisite domain is: ourdomain.nl
We built a website on subdomain konso.ourdomain.nl
The external domain is konso.nl and we would like that domain to map to our konso.ourdomain.nl.

Please help! ??

Thank you in advance

https://www.ads-software.com/plugins/wordpress-mu-domain-mapping/