Fatal error: Uncaught TypeError: JTL\Shop::setLanguage(): Argument #1 ($languageID) must be of type int, null given, called in /is/htdocs/wp12960936_NPXBXA12KI/www/glueckskiste/includes/src/Session/Frontend.php on line 321 and defined in /is/htdocs/wp12960936_NPXBXA12KI/www/glueckskiste/includes/src/Shop.php:355 Stack trace: #0 /is/htdocs/wp12960936_NPXBXA12KI/www/glueckskiste/includes/src/Session/Frontend.php(321): JTL\Shop::setLanguage(NULL, NULL) #1 /is/htdocs/wp12960936_NPXBXA12KI/www/glueckskiste/includes/src/Session/Frontend.php(117): JTL\Session\Frontend->updateGlobals() #2 /is/htdocs/wp12960936_NPXBXA12KI/www/glueckskiste/includes/src/Session/Frontend.php(75): JTL\Session\Frontend->setStandardSessionVars() #3 /is/htdocs/wp12960936_NPXBXA12KI/www/glueckskiste/includes/src/Session/Frontend.php(61): JTL\Session\Frontend->__construct(true, 'JTLSHOP') #4 /is/htdocs/wp12960936_NPXBXA12KI/www/glueckskiste/includes/globalinclude.php(96): JTL\Session\Frontend::getInstance() #5 /is/htdocs/wp12960936_NPXBXA12KI/www/glueckskiste/navi.php(5): require_once('/is/htdocs/wp12...') #6 {main} thrown in /is/htdocs/wp12960936_NPXBXA12KI/www/glueckskiste/includes/src/Shop.php on line 355