Hello , the same happens to me, there is no error in the logs, here are the latest entries:
84.253.20.114 - - [20/Jul/2015:09:21:48 +0200] "GET /www/admin/install.php?action=welcome HTTP/1.1" 200 19456 "http://adserver.net-metrix.ch/www/admin/install.php?action=database" "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/43.0.2357.134 Safari/537.36"
84.253.20.114 - - [20/Jul/2015:09:21:48 +0200] "HEAD /www/admin/install.php HTTP/1.1" 302 - "http://adserver.net-metrix.ch/www/admin/install.php?action=welcome" "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/43.0.2357.134 Safari/537.36"
84.253.20.114 - - [20/Jul/2015:09:21:48 +0200] "HEAD /www/admin/install.php?action=welcome HTTP/1.1" 200 - "http://adserver.net-metrix.ch/www/admin/install.php?action=welcome" "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/43.0.2357.134 Safari/537.36"
is there a SQL Dump for the DB available so I can try to install manually?
Thank you