Here's what I get on debug mode:
Call stack
Function
Location
1 ()
JROOT/components/com_sppagebuilder/views/page/view.html.php:56
2 SppagebuilderViewPage->_prepareDocument()
JROOT/components/com_sppagebuilder/views/page/view.html.php:39
3 SppagebuilderViewPage->display()
JROOT/libraries/src/MVC/Controller/BaseController.php:639
4 Joomla\CMS\MVC\Controller\BaseController->display()
JROOT/components/com_sppagebuilder/controller.php:39
5 SppagebuilderController->display()
JROOT/libraries/src/MVC/Controller/BaseController.php:672
6 Joomla\CMS\MVC\Controller\BaseController->execute()
JROOT/components/com_sppagebuilder/sppagebuilder.php:23
7 require_once()
JROOT/libraries/src/Dispatcher/LegacyComponentDispatcher.php:71
8 Joomla\CMS\Dispatcher\LegacyComponentDispatcher::Joomla\CMS\Dispatcher{closure}()
JROOT/libraries/src/Dispatcher/LegacyComponentDispatcher.php:73
9 Joomla\CMS\Dispatcher\LegacyComponentDispatcher->dispatch()
JROOT/libraries/src/Component/ComponentHelper.php:355
10 Joomla\CMS\Component\ComponentHelper::renderComponent()
JROOT/libraries/src/Application/SiteApplication.php:208
11 Joomla\CMS\Application\SiteApplication->dispatch()
JROOT/libraries/src/Application/SiteApplication.php:249
12 Joomla\CMS\Application\SiteApplication->doExecute()
JROOT/libraries/src/Application/CMSApplication.php:294
13 Joomla\CMS\Application\CMSApplication->execute()
JROOT/includes/app.php:61
14 require_once()
JROOT/index.php:32