I've just purchased the SJ Content Accordion v4.0 extension.
It will not install - I get an error "Undefined constant "JPATH_"".

In the logs I have...
#Fields: datetime priority clientip category message
2023-02-19T16:15:04+00:00 CRITICAL 86.171.47.250 error Uncaught Throwable of type Error thrown with message "Undefined constant "JPATH_"". Stack trace: #0 [ROOT]/libraries/src/Installer/Adapter/ModuleAdapter.php(369): constant()
#1 [ROOT]/libraries/src/Installer/Installer.php(628): Joomla\CMS\Installer\Adapter\ModuleAdapter->loadLanguage()
#2 [ROOT]/administrator/components/com_installer/src/Model/InstallModel.php(195): Joomla\CMS\Installer\Installer->install()
#3 [ROOT]/administrator/components/com_installer/src/Controller/InstallController.php(52): Joomla\Component\Installer\Administrator\Model\InstallModel->install()
#4 [ROOT]/administrator/components/com_installer/src/Controller/InstallController.php(100): Joomla\Component\Installer\Administrator\Controller\InstallController->install()
#5 [ROOT]/libraries/src/MVC/Controller/BaseController.php(672): Joomla\Component\Installer\Administrator\Controller\InstallController->ajax_upload()
#6 [ROOT]/libraries/src/Dispatcher/ComponentDispatcher.php(143): Joomla\CMS\MVC\Controller\BaseController->execute()
#7 [ROOT]/libraries/src/Component/ComponentHelper.php(355): Joomla\CMS\Dispatcher\ComponentDispatcher->dispatch()
#8 [ROOT]/libraries/src/Application/AdministratorApplication.php(143): Joomla\CMS\Component\ComponentHelper::renderComponent()
#9 [ROOT]/libraries/src/Application/AdministratorApplication.php(186): Joomla\CMS\Application\AdministratorApplication->dispatch()
#10 [ROOT]/libraries/src/Application/CMSApplication.php(294): Joomla\CMS\Application\AdministratorApplication->doExecute()
#11 [ROOT]/administrator/includes/app.php(61): Joomla\CMS\Application\CMSApplication->execute()
#12 [ROOT]/administrator/index.php(32): require_once('/home/waltersf/...')
#13 {main}

Can you please help me?

I have Joomla 4.2.8 with PHP 8.2.3.

Many thanks,

Paul.

Dear sir
Can you send me account your website ? ( account ftp , account admin) i will check it
Thank you!

Hello.
For testing I tried to apply it to a fairly vanilla install of Joomla 4.2.7 completely independent of the site I bought it for and it does exactly the same.
Would it be possible for you to fix this without being given access to my site, as this cannot be granted?
Thank you.
Paul.

Dear Sir

Can send us the domain and admin account to check faster for you.

Thanks