Fatal error: Uncaught Error: Value of type null is not callable in /var/www/vhosts/reitsport-manski.de/httpdocs/shop/plugins/ws5_mollie/lib/Hook/Checkbox.php:2 Stack trace: #0 /var/www/vhosts/reitsport-manski.de/httpdocs/shop/includes/vendor/composer/ClassLoader.php(571): include() #1 /var/www/vhosts/reitsport-manski.de/httpdocs/shop/includes/vendor/composer/ClassLoader.php(428): Composer\Autoload\includeFile() #2 /var/www/vhosts/reitsport-manski.de/httpdocs/shop/plugins/ws5_mollie/vendor/webstollen/jtl5-core-plugin-library-v1_0_16/src/Bootstrap.php(2) : eval()'d code(173): Composer\Autoload\ClassLoader->loadClass() #3 /var/www/vhosts/reitsport-manski.de/httpdocs/shop/plugins/ws5_mollie/Bootstrap.php(2) : eval()'d code(34): WS\JTL5\V1_0_16\Bootstrap->listen() #4 /var/www/vhosts/reitsport-manski.de/httpdocs/shop/includes/src/Shop.php(444): Plugin\ws5_mollie\Bootstrap->boot() #5 /var/www/vhosts/reitsport-manski.de/httpdocs/shop/includes/globalinclude.php(97): JTL\Shop::bootstrap() #6 /var/www/vhosts/reitsport-manski.de/httpdocs/shop/index.php(5): require('...') #7 {main} thrown in /var/www/vhosts/reitsport-manski.de/httpdocs/shop/plugins/ws5_mollie/lib/Hook/Checkbox.php on line 2