Joomla 4.2.29 / Virtuemart 4.0.12 / AWO Coupon 4.0.0.6

I am testing the migration to Joomla 4 for an existing project. I have successfully updated Joomla by deinstalling AWO Coupon version 3 upgrading and then installing version 4 of AWO Coupon. Now I get the error message below. I did a print_r(AC());  the output is added below. The AC()->store is empty therefore the line 301:

elseif( method_exists( AC()->store, 'html_main_menu' ) ) {

fails. I have no idea why that happens. The only thing suspicious is that AWOCOUPON_VERSION_DB is still 3.6.0.10.

0 method_exists(): Argument #1 ($object_or_class) must be of type object|string, null given

Call stack
#     Function     Location
1     ()     JROOT/administrator/components/com_awocoupon/awocoupon/admin/class-awocoupon-admin-menu.php:303
2     method_exists()     JROOT/administrator/components/com_awocoupon/awocoupon/admin/class-awocoupon-admin-menu.php:303
3     AwoCoupon_Admin_Menu->print_menu()     JROOT/administrator/components/com_awocoupon/awocoupon/admin/class-awocoupon-admin-menu.php:32
4     AwoCoupon_Admin_Menu->process()     JROOT/administrator/components/com_awocoupon/awocoupon/admin/class-awocoupon-admin-admin.php:25
5     AwoCoupon_Admin_Admin::display()     JROOT/administrator/components/com_awocoupon/src/Controller/DisplayController.php:40
6     AwoDev\Component\AwoCoupon\Administrator\Controller\DisplayController->display()     JROOT/libraries/src/MVC/Controller/BaseController.php:672
7     Joomla\CMS\MVC\Controller\BaseController->execute()     JROOT/libraries/src/Dispatcher/ComponentDispatcher.php:143
8     Joomla\CMS\Dispatcher\ComponentDispatcher->dispatch()     JROOT/libraries/src/Component/ComponentHelper.php:355
9     Joomla\CMS\Component\ComponentHelper::renderComponent()     JROOT/libraries/src/Application/AdministratorApplication.php:143
10     Joomla\CMS\Application\AdministratorApplication->dispatch()     JROOT/libraries/src/Application/AdministratorApplication.php:186
11     Joomla\CMS\Application\AdministratorApplication->doExecute()     JROOT/libraries/src/Application/CMSApplication.php:294
12     Joomla\CMS\Application\CMSApplication->execute()     JROOT/administrator/includes/app.php:61
13     require_once()     JROOT/administrator/index.php:32

AwoCoupon Object
(
    [version] => 4.0.0.6
    [db] => AwoCoupon_Helper_Database Object
        (
        )

    [helper] => AwoCoupon_Helper_Helper Object
        (
            [is_check_dbupdate:protected] => 1
        )

    [param] => Awocoupon_Library_Param Object
        (
        )

    [store_id] =>
    [store] =>
    [storecurrency] =>
    [storediscount] =>
    [storegift] =>
    [coupon] => AwoCoupon_Library_Coupon Object
        (
        )

    [lang] => AwoCoupon_Helper_Language Object
        (
        )

    [profile] => Awocoupon_Library_Profile Object
        (
        )

)

Hello,

Sounds like your store is not set.  In table #__awocoupon_config, is the key "estore" set to "virtuemart"?

Also, as you are still seeing 3.6 version, your db did not get updated.  Did you load awocoupon dashboard in the backend?  It should automatically update your db from there.