Look your error log. Here the solution
  • Just after install I noticied my Apache error log was growing up in Mb of PHP Notice.
    Here is the solution:

    in classes/SystemPref.php

    search for:

    $preferences[] = "$key => '" . addslashes($value) . "'"; (line 156)

    and change to:

    $preferences[] = "'$key' => '" . addslashes($value) . "'";

    ---> Add '' between $key

    Make any change in System Preferences and your file will be updated.