Last step of checkout ends with Call to undefined method error

-- url of the page with the problem -- : www.aloe-vera-fuerteventura.com
-- HikaShop version -- : 4.7.3
-- Joomla version -- : 4.3.2
-- PHP version -- : 8.1
-- Browser(s) name and version -- : Firefox, Chrome
-- Error-message(debug-mod must be tuned on) -- : Call to undefined method Joomla\CMS\Application\SiteApplication::isAdmin()

JROOT/media/com_hikashop/mail/order_creation_notification.preload.modified.php:61
2 include() JROOT/administrator/components/com_hikashop/classes/mail.php:362
3 hikashopMailClass->loadEmail() JROOT/administrator/components/com_hikashop/classes/mail.php:31
4 hikashopMailClass->get() JROOT/administrator/components/com_hikashop/classes/order.php:2075
5 hikashopOrderClass->loadOrderNotification() JROOT/administrator/components/com_hikashop/classes/order.php:442
6 hikashopOrderClass->save() JROOT/administrator/components/com_hikashop/classes/order.php:913
7 hikashopOrderClass->createFromCart() JROOT/components/com_hikashop/controllers/checkout.php:678
8 checkoutController->confirm() JROOT/libraries/src/MVC/Controller/BaseController.php:678
9 Joomla\CMS\MVC\Controller\BaseController->execute() JROOT/administrator/components/com_hikashop/helpers/helper.php:2437
10 hikashopController->execute() JROOT/components/com_hikashop/hikashop.php:88

Hello,
Call to undefined method error on checkout after last step.
See attachment for shown errors.
This issue started after Joomla update to vers 4.3.2
an identical Hikashop installation with Joomla vers 4.3.1 works fine.

Help needed, no more sales on the shop

Thomas

Hi,

The issue is not in HikaShop itself. That's why you don't have the issue on the other website.
It comes from the customization of the "preload" section of the order creation notification email via the menu System>Emails. It must be based on a really old version of HikaShop, which contained code we had to modify to be compatible with Joomla 4.
So you'll need to redo your modifications on the new version of the preload.

Hi Nicolas.
10 seconds to delete - done.
Your a genius!
Strange that the shop was running fine until this last Joomla Update.
Grateful
Thomas