Restricting non-logged in user to see the free unit

Please add the given code in your wplms-customizer.php file in wplms customizer plugin  :

add_filter('bp_course_get_full_course_curriculum','wplms_restrict_free_user_access',9,1);
function wplms_restrict_free_user_access($args){
	if(!is_user_logged_in()){
		foreach($args as $k => $arg){
			$args[$k]['link'] = '';
		}
	}
	return $args;
}