Catchable fatal error: Argument 1 passed to CCL\Content\Element\Basic\Container::addChild() must be an instance of CCL\Content\Element\Basic\Element, null given, called in /home/geldropsmuziekcorps.nl/public_html/components/com_dpcalendar/layouts/location/details.php on line 102 and defined in /home/geldropsmuziekcorps.nl/public_html/administrator/components/com_dpcalendar/libraries/vendor/Digital-Peak/ccl/src/CCL/Content/Element/Basic/Container.php on line 56