Error when saving Additional info on order

-- HikaShop version -- : 4.4.5
-- Joomla version -- : 3.10.4
-- PHP version -- : 8.0.14
-- Error-message(debug-mod must be tuned on) -- : # Function Location
1 () JROOT/administrator/components/com_hikashop/classes/order.php:1165
2 hikashopOrderClass->saveForm() JROOT/administrator/components/com_hikashop/controllers/order.php:608
3 OrderController->save() JROOT/libraries/src/MVC/Controller/BaseController.php:702
4 Joomla\CMS\MVC\Controller\BaseController->execute() JROOT/administrator/components/com_hikashop/helpers/helper.php:2286
5 hikashopController->execute() JROOT/administrator/components/com_hikashop/hikashop.php:73
6 require_once() JROOT/libraries/src/Component/ComponentHelper.php:402
7 Joomla\CMS\Component\ComponentHelper::executeComponent() JROOT/libraries/src/Component/ComponentHelper.php:377
8 Joomla\CMS\Component\ComponentHelper::renderComponent() JROOT/libraries/src/Application/AdministratorApplication.php:101
9 Joomla\CMS\Application\AdministratorApplication->dispatch() JROOT/libraries/src/Application/AdministratorApplication.php:159
10 Joomla\CMS\Application\AdministratorApplication->doExecute() JROOT/libraries/src/Application/CMSApplication.php:225
11 Joomla\CMS\Application\CMSApplication->execute() JROOT/administrator/index.php:51

Hi

When I on an order edit additional info and click save, I get this error and nothing is saved:

An error has occurred.
0 count(): Argument #1 ($value) must be of type Countable|array, string given

Works, thanks!