Catchable fatal error: Argument 1 passed to ShopGui::isSaleCategory() must be an array, boolean given, called in /var/www/vhosts/mtm-online.de/httpdocs/simplyflex/modules/shopmodule/frontend/view/ShopGui.php on line 410 and defined in /var/www/vhosts/mtm-online.de/httpdocs/simplyflex/modules/shopmodule/frontend/view/ShopGui.php on line 291