No, but I used similar way - I already have all the needed components installed (and MariaDB instead of MySQL, but there are fully compatible).
So, how should fix it? I already tried to reinstall it.
No, there were no errors.
I have a clean installation of the latest stable ISPConfig on Debian 6. As I see, there is no sys_user table, because the system users are stored...
Separate names with a comma.