Catchable fatal error: Argument 1 passed to Topxia\Service\Taxonomy\Impl\TagServiceImpl::findTagsByIds() must be of the type array, null given, called in /www/wwwroot/zt.wyaqpx.com/src/Topxia/WebBundle/Controller/CourseController.php on line 236 and defined in /www/wwwroot/zt.wyaqpx.com/src/Topxia/Service/Taxonomy/Impl/TagServiceImpl.php on line 41