Fatal error: Uncaught TypeError: JTL\Shop::setLanguage(): Argument #1 ($languageID) must be of type int, null given, called in /var/www/clients/client2/web36/web/includes/src/Session/Frontend.php on line 272 and defined in /var/www/clients/client2/web36/web/includes/src/Shop.php:821 Stack trace: #0 /var/www/clients/client2/web36/web/includes/src/Session/Frontend.php(272): JTL\Shop::setLanguage() #1 /var/www/clients/client2/web36/web/includes/src/Session/Frontend.php(91): JTL\Session\Frontend->updateGlobals() #2 /var/www/clients/client2/web36/web/includes/src/Session/Frontend.php(63): JTL\Session\Frontend->setStandardSessionVars() #3 /var/www/clients/client2/web36/web/includes/src/Session/Frontend.php(49): JTL\Session\Frontend->__construct() #4 /var/www/clients/client2/web36/web/includes/globalinclude.php(120): JTL\Session\Frontend::getInstance() #5 /var/www/clients/client2/web36/web/index.php(6): require('...') #6 {main} thrown in /var/www/clients/client2/web36/web/includes/src/Shop.php on line 821