Thanks. Trying to uninstall the plugins results in the following error trace (Joomla 4.4.5):
# Function Location
1 () JROOT/plugins/vmpayment/awocoupon/script.php:29
2 plgVmPaymentAwoCouponInstallerScript->fixManifest() JROOT/plugins/vmpayment/awocoupon/script.php:24
3 plgVmPaymentAwoCouponInstallerScript->postflight()
4 call_user_func_array() JROOT/libraries/src/Installer/LegacyInstallerScript.php:158
5 Joomla\CMS\Installer\LegacyInstallerScript->__call() JROOT/libraries/src/Installer/LegacyInstallerScript.php:187
6 Joomla\CMS\Installer\LegacyInstallerScript->callOnScript() JROOT/libraries/src/Installer/LegacyInstallerScript.php:113
7 Joomla\CMS\Installer\LegacyInstallerScript->postflight() JROOT/libraries/src/Installer/InstallerAdapter.php:1060
8 Joomla\CMS\Installer\InstallerAdapter->triggerManifestScript() JROOT/libraries/src/Installer/InstallerAdapter.php:1234
9 Joomla\CMS\Installer\InstallerAdapter->uninstall() JROOT/libraries/src/Installer/Installer.php:877
10 Joomla\CMS\Installer\Installer->uninstall() JROOT/administrator/components/com_installer/src/Model/ManageModel.php:263
11 Joomla\Component\Installer\Administrator\Model\ManageModel->remove() JROOT/administrator/components/com_installer/src/Controller/ManageController.php:120
12 Joomla\Component\Installer\Administrator\Controller\ManageController->remove() JROOT/libraries/src/MVC/Controller/BaseController.php:693
13 Joomla\CMS\MVC\Controller\BaseController->execute() JROOT/libraries/src/Dispatcher/ComponentDispatcher.php:143
14 Joomla\CMS\Dispatcher\ComponentDispatcher->dispatch() JROOT/libraries/src/Component/ComponentHelper.php:361
15 Joomla\CMS\Component\ComponentHelper::renderComponent() JROOT/libraries/src/Application/AdministratorApplication.php:143
16 Joomla\CMS\Application\AdministratorApplication->dispatch() JROOT/libraries/src/Application/AdministratorApplication.php:186
17 Joomla\CMS\Application\AdministratorApplication->doExecute() JROOT/libraries/src/Application/CMSApplication.php:293
18 Joomla\CMS\Application\CMSApplication->execute() JROOT/administrator/includes/app.php:61
19 require_once() JROOT/administrator/index.php:32
I will give another try with uninstalling Awocoupon first before migrating to Joomla 4.