Chamilo LCMS Connect » Core » Installation

When clicking the "Install Chamilo 2.0" button, I get a blank page.

Here is the stacktrace (from xdebug):
PHP Fatal error: Call to a member function handle() on a non-object in /var/www/chamilo/common/libraries/plugin/pear/HTML/QuickForm/Controller.php on line 141, referer: http://localhost/chamilo/
PHP Stack trace:, referer: http://localhost/chamilo/
PHP 1. {main}() /var/www/chamilo/install/index.php:0, referer: http://localhost/chamilo/
PHP 2. common\\libraries\\Application::launch($application_name = uninitialized, $user = uninitialized) /var/www/chamilo/install/index.php:46, referer: http://localhost/chamilo/
PHP 3. install\\InstallManagerInstallerComponent->run() /var/www/chamilo/common/libraries/php/application.class.php:852, referer: http://localhost/chamilo/
PHP 4. HTML_QuickForm_Controller->run() /var/www/chamilo/install/php/lib/install_manager/component/installer.class.php:45, referer: http://localhost/chamilo/

Using the latest source on Ubuntu 11.10, PHP-5.4. All the requirements are installed.