Hello ;
You can add that configuration snippet into a custom file such as /etc/apache2/sites-available/10_cluebringer.conf but you must also define permissions because by default we prevent www-data to access any file other than those managed by i-MSCP.
To resume, you could try something like this:
1. Create the file /etc/apache2/sites-available/10_cluebringer.conf with the following content
2. Enable the new configuration file and restart Apache2
Once done, you should be able to access your software interface using url such as http://<your_domain.tld>/cluebringer
thank you very much
I forgot to describe this not be achieved through our https protocol
in case we have to for unlawful?
http 80 port
https:443,4443 
I made the change, but unfortunately still receive this phenomenon.
https://mail.elektrogold.hu/cluebringer/
Error 404
Page Not Found
Re;
You want access that interface through panel domain or your customers's domains? For the first case, you must operate at Nginx configuration level, else, you must operate at Apache2 configuration level (as shown in my previous post). Give us more details and if you don't figure out alone, add my SSH key to your server and I'll setup that for you but first please, give us more details 