Fatal error: Uncaught TypeError: JTL\Template\Model::getTemplateType(): Return value must be of type string, null returned in /var/www/vhosts/buettner.aix-cloud.de/jtl/includes/src/Template/Model.php:252 Stack trace: #0 /var/www/vhosts/buettner.aix-cloud.de/jtl/includes/src/Template/TemplateService.php(207): JTL\Template\Model->getTemplateType() #1 /var/www/vhosts/buettner.aix-cloud.de/jtl/includes/src/Template/TemplateService.php(152): JTL\Template\TemplateService->loadFull() #2 /var/www/vhosts/buettner.aix-cloud.de/jtl/includes/src/Smarty/JTLSmarty.php(108): JTL\Template\TemplateService->getActiveTemplate() #3 /var/www/vhosts/buettner.aix-cloud.de/jtl/includes/src/Smarty/JTLSmarty.php(68): JTL\Smarty\JTLSmarty->initTemplate() #4 /var/www/vhosts/buettner.aix-cloud.de/jtl/includes/globalinclude.php(74): JTL\Smarty\JTLSmarty->__construct() #5 /var/www/vhosts/buettner.aix-cloud.de/jtl/index.php(7): require('...') #6 {main} thrown in /var/www/vhosts/buettner.aix-cloud.de/jtl/includes/src/Template/Model.php on line 252