Critical Error
date_format(): Argument #1 ($object) must be of type DateTimeInterface, false given
File: /var/www/vhosts/kunstschule-ikarus.tesaron.com/httpdocs/cms/modules/verwaltung_kurse/module.php Line: 39
Call Stack
Root::date_format(
)
File: module.php Line: 39
module_verwaltung_kurse::indexAction(
)
File: index.php Line: 236