I am currently testing your product and have added a client.
I enabled the start page for this client but it is giving me a 404 error when i visit the page.
/var/www/vhosts/shoutcast.domain.com/ is where it is installed.
I can confirm the directory "start" is there, and there is only a .htaccess file in it. The mod_rewrite is enabled and functioning properly.
Searching around I was unable to find any tips in regards to this. Here is my .htaccess file in /var/www/vhosts/shoutcast.domain.com/start/
#
# mod_rewrite in use
#
RewriteEngine On
# Uncomment following line if your webserver's URL
# is not directly related to physival file paths.
# Update YourRootDirectory (just / for root)
#RewriteBase /var/www/vhosts/shoutcast.jinxshells.com
#
# Rules
#
RewriteRule ^(.*) ../start.php