Chamilo LCMS Connect

I have downloaded the latest LCMS version (changeset: 3556:a66f98c1d49d)
I logged in and created a course under "Education" --> "Courses", and enabled all the tools.
I went to the repository, selected the "Welcome" announcement, I clicked the "Publish" button, then came the following error:

I tried other content-objects in the repository, and resulted the same error. btw, I did not turn on the CAS authentication (see attachment)

Fatal error: Class 'application\cas_user\CasUserManager' not found in /var/www/core/repository/php/lib/repository_manager/component/publisher_wizard/pages/location_selection_publisher_wizard_page.class.php on line 150 Call Stack: 0.0810 677960 1. {main}() /var/www/core/index.php:0 4.5794 16703424 2. common\libraries\Application::launch(?, ?) /var/www/core/index.php:90 4.6253 23178304 3. repository\RepositoryManagerPublisherComponent->run() /var/www/core/common/libraries/php/shared/application.class.php:787 4.6612 26471704 4. HTML_QuickForm_Controller->run() /var/www/core/repository/php/lib/repository_manager/component/publisher.class.php:21 4.6613 26472536 5. common\libraries\FormValidatorPage->handle(?) /var/www/core/common/libraries/plugin/pear/HTML/QuickForm/Controller.php:138 4.6613 26472616 6. HTML_QuickForm_Controller->handle(?, ?) /var/www/core/common/libraries/php/shared/html/formvalidator/form_validator_page.class.php:101 4.6613 26472616 7. HTML_QuickForm_Action_Display->perform(?, ???) /var/www/core/common/libraries/plugin/pear/HTML/QuickForm/Controller.php:198 4.6615 26472696 8. repository\LocationSelectionPublisherWizardPage->buildForm() /var/www/core/common/libraries/plugin/pear/HTML/QuickForm/Action/Display.php:68 Variables in local scope (#8): $admin = uninitialized $application = 'application\\cas_user\\CasUserManager' $application_name = 'cas_user' $applications = array (0 => 'reservations', 1 => 'personal_calendar', 2 => 'cache', 3 => 'portfolio', 4 => 'weblcms', 5 => 'laika', 6 => 'cas_user', 7 => 'personal_messenger', 8 => 'handbook', 9 => 'forum') $html = '' $location_count = 1 $locations = array () $prevnext = uninitialized