Issue with mod_sp_portfolio after upgrade to Joomla4

Dear JoomShaper Team,
could you please helpt? All the sites which are using the SP Portfolio module are throwing this error, after I've upgraded to Joomla 4:

0
Oops... Page Not Found!
We're sorry, but the page you were looking for doesn't exist.

Class "JRequest" not found
Call stack
#   Function    Location
1   ()  JROOT/modules/mod_sp_portfolio/mod_sp_portfolio.php:16
2   include()   JROOT/libraries/src/Dispatcher/ModuleDispatcher.php:52
3   Joomla\CMS\Dispatcher\ModuleDispatcher::Joomla\CMS\Dispatcher\{closure}()   JROOT/libraries/src/Dispatcher/ModuleDispatcher.php:55
4   Joomla\CMS\Dispatcher\ModuleDispatcher->dispatch()  JROOT/libraries/src/Helper/ModuleHelper.php:281
5   Joomla\CMS\Helper\ModuleHelper::renderRawModule()   JROOT/libraries/src/Helper/ModuleHelper.php:161
6   Joomla\CMS\Helper\ModuleHelper::renderModule()  JROOT/libraries/src/Document/Renderer/Html/ModuleRenderer.php:99
7   Joomla\CMS\Document\Renderer\Html\ModuleRenderer->render()  JROOT/libraries/src/Document/Renderer/Html/ModulesRenderer.php:50
8   Joomla\CMS\Document\Renderer\Html\ModulesRenderer->render() JROOT/libraries/src/Document/HtmlDocument.php:565
9   Joomla\CMS\Document\HtmlDocument->getBuffer()   JROOT/libraries/src/Document/HtmlDocument.php:848
10  Joomla\CMS\Document\HtmlDocument->_renderTemplate() JROOT/libraries/src/Document/HtmlDocument.php:633
11  Joomla\CMS\Document\HtmlDocument->render()  JROOT/libraries/src/Application/CMSApplication.php:1017
12  Joomla\CMS\Application\CMSApplication->render() JROOT/libraries/src/Application/SiteApplication.php:714
13  Joomla\CMS\Application\SiteApplication->render()    JROOT/libraries/src/Application/CMSApplication.php:299
14  Joomla\CMS\Application\CMSApplication->execute()    JROOT/includes/app.php:61
15  require_once()  JROOT/index.php:32

The sites that I'm talking about are the folllowing:
https://j4.traubling.de/unternehmen
https://j4.traubling.de/vereine

All modules are up to date.

Big thanks in advance.

BR