Did you run installer?
If you really don't have error logs in your server, for me it sounds like it's really not meant for installing own stuff.
You could get more info by
1) checking browser errors
2) checking browser response for the AJAX requests
3) setting custom error log file
$CONFIGURATION = array(
...,
"debug" => TRUE,
"debug_log" => "/mollify/debug.log", // CHANGE THIS
);
But here it's important that the location must be writable, and you should use absolute path if possible.