// Do not allow guests to start tests
Roles roles = ureq.getUserSession().getRoles();
if (roles.isGuestOnly()) {
Translator trans = new PackageTranslator(PACKAGE, ureq.getLocale());
String title = trans.translate("guestnoaccess.title");
String message = trans.translate("guestnoaccess.message");
controller = MessageUIFactory.createInfoMessage(ureq, wControl, title, message);
} else {
AssessmentManager am = userCourseEnv.getCourseEnvironment().getAssessmentManager();
IQSecurityCallback sec = new CourseIQSecurityCallback(this, am, ureq.getIdentity());
RepositoryEntry repositoryEntry = ne.getCourseNode().getReferencedRepositoryEntry();