Steps to reproduce the issue

-Start to create new article (do not save it yet)
-Choose a category for new article
-URL while doing this action :
https://mysite/administrator/index.php?option=com_content&view=article&layout=edit

Expected result

New article becomes assigned to the chosen category

Actual result

Joomla multicolor splash screen lightbox animation pops up for 2-3 seconds
backend reports error : "method_exists(): Argument #1 ($object_or_class) must be of type object|string, array given"

System information (as much as possible)

PHP 8
Joomla 4.0.4

Additional comments

NB, i've set PageBuilderCK to be my main article editor, but the issue happens when this is not set this way too...

Stack Trace:
Call stack

Function Location

1 () JROOT/plugins/system/pagebuilderck/pagebuilderck.php:77
2 method_exists() JROOT/plugins/system/pagebuilderck/pagebuilderck.php:77
3 plgSystemPagebuilderck->onContentPrepareForm() JROOT/libraries/src/Plugin/CMSPlugin.php:285
4 Joomla\CMS\Plugin\CMSPlugin->Joomla\CMS\Plugin{closure}() JROOT/libraries/vendor/joomla/event/src/Dispatcher.php:486
5 Joomla\Event\Dispatcher->dispatch() JROOT/libraries/src/Application/EventAware.php:111
6 Joomla\CMS\Application\WebApplication->triggerEvent() JROOT/libraries/src/MVC/Model/FormBehaviorTrait.php:179
7 Joomla\CMS\MVC\Model\FormModel->preprocessForm() JROOT/administrator/components/com_content/src/Model/ArticleModel.php:1105
8 Joomla\Component\Content\Administrator\Model\ArticleModel->preprocessForm() JROOT/libraries/src/MVC/Model/FormBehaviorTrait.php:117
9 Joomla\CMS\MVC\Model\FormModel->loadForm() JROOT/administrator/components/com_content/src/Model/ArticleModel.php:490
10 Joomla\Component\Content\Administrator\Model\ArticleModel->getForm() JROOT/libraries/src/MVC/View/AbstractView.php:146
11 Joomla\CMS\MVC\View\AbstractView->get() JROOT/administrator/components/com_content/src/View/Article/HtmlView.php:87
12 Joomla\Component\Content\Administrator\View\Article\HtmlView->display() JROOT/libraries/src/MVC/Controller/BaseController.php:692
13 Joomla\CMS\MVC\Controller\BaseController->display() JROOT/administrator/components/com_content/src/Controller/DisplayController.php:63
14 Joomla\Component\Content\Administrator\Controller\DisplayController->display() JROOT/libraries/src/MVC/Controller/BaseController.php:730
15 Joomla\CMS\MVC\Controller\BaseController->execute() JROOT/libraries/src/Dispatcher/ComponentDispatcher.php:146
16 Joomla\CMS\Dispatcher\ComponentDispatcher->dispatch() JROOT/libraries/src/Component/ComponentHelper.php:389
17 Joomla\CMS\Component\ComponentHelper::renderComponent() JROOT/libraries/src/Application/AdministratorApplication.php:143
18 Joomla\CMS\Application\AdministratorApplication->dispatch() JROOT/libraries/src/Application/AdministratorApplication.php:186
19 Joomla\CMS\Application\AdministratorApplication->doExecute() JROOT/libraries/src/Application/CMSApplication.php:278
20 Joomla\CMS\Application\CMSApplication->execute() JROOT/administrator/includes/app.php:63
21 require_once() JROOT/administrator/index.php:32