I get error 404 after the upgrade

Same problem here. Blank page when trying to do anything with SP Page Builder after installing update. HELP!

Addendum:
I get the same result if I create a new page and, then, I select any language different from English. I also reinstalled the languages, but the problem is still there.

Corrado

Hi Toufiq,
thank you for contacting me. Unfortunately, I'm working inside a xampp environment, so that the site is not externally accessibile. Please, tell me how can I support you to debug the problem.
Best regards,
Corrado

Hi Toufiq,
php version 7.4.29, Page Builder 4.0.1.
This is the error I get when I try to edit an existing page which is not in English:

Location
1 () JROOT/components/com_sppagebuilder/models/form.php:128
2 SppagebuilderModelForm->getItem() JROOT/libraries/src/MVC/View/AbstractView.php:153
3 Joomla\CMS\MVC\View\AbstractView->get() JROOT/components/com_sppagebuilder/views/form/view.html.php:28
4 SppagebuilderViewForm->display() JROOT/libraries/src/MVC/Controller/BaseController.php:697
5 Joomla\CMS\MVC\Controller\BaseController->display() JROOT/components/com_sppagebuilder/controller.php:80
6 SppagebuilderController->display() JROOT/libraries/src/MVC/Controller/BaseController.php:735
7 Joomla\CMS\MVC\Controller\BaseController->execute() JROOT/components/com_sppagebuilder/sppagebuilder.php:26
8 require_once() JROOT/libraries/src/Dispatcher/LegacyComponentDispatcher.php:69
9 Joomla\CMS\Dispatcher\LegacyComponentDispatcher::Joomla\CMS\Dispatcher{closure}() JROOT/libraries/src/Dispatcher/LegacyComponentDispatcher.php:71
10 Joomla\CMS\Dispatcher\LegacyComponentDispatcher->dispatch() JROOT/libraries/src/Component/ComponentHelper.php:389
11 Joomla\CMS\Component\ComponentHelper::renderComponent() JROOT/libraries/src/Application/SiteApplication.php:204
12 Joomla\CMS\Application\SiteApplication->dispatch() JROOT/libraries/src/Application/SiteApplication.php:243
13 Joomla\CMS\Application\SiteApplication->doExecute() JROOT/libraries/src/Application/CMSApplication.php:278
14 Joomla\CMS\Application\CMSApplication->execute() JROOT/includes/app.php:63
15 require_once() JROOT/index.php:32

Best regards,
Corrado

Hi Toufiq,
I eliminated large part of the site contents and I can upload the akeeba backup of the site. Please, tell me how I can upload the file.

Best regards,
Corrado

Hi Toufiq,
I reinstalled release 4.0.1 of Page Builder, but the problem is still there. As I wrote in my previuos comments, I can upload a compact version of my site (an Akeeba backup) if you indicate me an upload link.
Best regards, Corrado