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in builder forum selecteren in dropdown geeft fatal error

op icoon klikken geeft geen fout

Fatal error: Call to a member function get_name() on a non-object in /var/www/chamilo-stable/chamilo/repository/php/lib/content_object_type_selector.class.php on line 186
Call Stack
Time Memory Function Location
1 0.0001 329008 {main}( ) ../run.php:0
2 0.5650 3542964 common\libraries\Application::launch( ) ../run.php:40
3 0.8559 11669832 application\weblcms\WeblcmsManagerCourseViewerComponent->run( ) ../application.class.php:865
4 0.8726 11674580 application\weblcms\Tool::launch( ) ../course_viewer.class.php:170
5 0.8748 11712848 common\libraries\SubManager::launch( ) ../tool.class.php:570
6 0.8781 11749808 application\weblcms\tool\forum\ForumToolComplexBuilderComponent->run( ) ../sub_manager.class.php:356
7 0.8781 11749808 application\weblcms\ToolComponent::launch( ) ../complex_builder.class.php:19
8 0.8781 11749956 common\libraries\SubManager::launch( ) ../tool_component.class.php:198
9 0.8799 11779200 application\weblcms\ToolComponentComplexBuilderComponent->run( ) ../sub_manager.class.php:356
10 0.9542 14094012 repository\ComplexBuilder::launch( ) ../complex_builder.class.php:28
11 0.9554 14132440 common\libraries\SubManager::launch( ) ../complex_builder.class.php:125
12 0.9605 14217504 repository\content_object\forum\ForumBuilderCreatorComponent->run( ) ../sub_manager.class.php:356
13 0.9961 14785116 common\extensions\repo_viewer\RepoViewerCreatorComponent->run( ) ../creator.class.php:79
14 1.0000 14912044 repository\ContentObjectTypeSelector->__construct( ) ../creator.class.php:47
15 1.0003 14912520 repository\ContentObjectTypeSelector->prepare( ) ../content_object_type_selector.class.php:83