Resolved Update problem, Class "RantaiPluginDispatcher" not found

Hi, after update to RO CSVI 8.4.0 on J3 and J4 (different domains)

Using VirtueMart 4.0.7 10718

Package was updating successful and custom fields and rest

I remain to update

RO CSVI - VirtueMart - Product Cart Variant - Site Plugin 8.3.2 - 8.4.0
RO CSVI - VirtueMart - Product Filter - Site Plugin 8.3.2 - 8.4.0
RO CSVI - VirtueMart - Related Articles Site Plugin 8.3.2 - 8.4.0
RO CSVI - VirtueMart - Text Site Plugin 8.3.2 - 8.4.0

If I press any of these I get:

This is debug from J4

An error has occurred.

0 Class "RantaiPluginDispatcher" not found

Call stack
# Function Location
1 () JROOT/plugins/csviext/productcartvariant/productcartvariant.php:26
2 require_once() JROOT/libraries/src/Extension/ExtensionManagerTrait.php:214
3 Joomla\CMS\Application\CMSApplication->loadPluginFromFilesystem() JROOT/libraries/src/Extension/ExtensionManagerTrait.php:157
4 Joomla\CMS\Application\CMSApplication->loadExtension() JROOT/libraries/src/Extension/ExtensionManagerTrait.php:96
5 Joomla\CMS\Application\CMSApplication->bootPlugin() JROOT/libraries/src/Plugin/PluginHelper.php:221
6 Joomla\CMS\Plugin\PluginHelper::import() JROOT/libraries/src/Plugin/PluginHelper.php:181
7 Joomla\CMS\Plugin\PluginHelper::importPlugin() JROOT/administrator/components/com_installer/src/Model/UpdateModel.php:595
8 Joomla\Component\Installer\Administrator\Model\UpdateModel->preparePreUpdate() JROOT/administrator/components/com_installer/src/Model/UpdateModel.php:351
9 Joomla\Component\Installer\Administrator\Model\UpdateModel->update() JROOT/administrator/components/com_installer/src/Controller/UpdateController.php:58
10 Joomla\Component\Installer\Administrator\Controller\UpdateController->update() JROOT/libraries/src/MVC/Controller/BaseController.php:672
11 Joomla\CMS\MVC\Controller\BaseController->execute() JROOT/libraries/src/Dispatcher/ComponentDispatcher.php:143
12 Joomla\CMS\Dispatcher\ComponentDispatcher->dispatch() JROOT/libraries/src/Component/ComponentHelper.php:355
13 Joomla\CMS\Component\ComponentHelper::renderComponent() JROOT/libraries/src/Application/AdministratorApplication.php:143
14 Joomla\CMS\Application\AdministratorApplication->dispatch() JROOT/libraries/src/Application/AdministratorApplication.php:186
15 Joomla\CMS\Application\AdministratorApplication->doExecute() JROOT/libraries/src/Application/CMSApplication.php:294
16 Joomla\CMS\Application\CMSApplication->execute() JROOT/administrator/includes/app.php:61
17 require_once() JROOT/administrator/index.php:32



Thank you