0 - Argument 2 passed to Organizer\Views\HTML\BaseView::setTitle() must be of the type string, null given, called in /srv/www/websites/organizer/components/com_organizer/Views/HTML/ItemView.php on line 58

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Argument 2 passed to Organizer\Views\HTML\BaseView::setTitle() must be of the type string, null given, called in /srv/www/websites/organizer/components/com_organizer/Views/HTML/ItemView.php on line 58 (https://www.thm.de/organizer/?option=com_organizer&view=subject_item&languageTag=de&id=3061 )