An error has occurred: Call to a member function update() on null

Unable to create and edit events. It is showing error message with: An error has occurred: Call to a member function update() on null. Please see the completed message at below. Thank you for your help.

An error has occurred.
0 Call to a member function update() on null
/var/www/html/joomla3.2/libraries/src/Editor/Editor.php:396
Call stack
# Function Location
1 () JROOT/libraries/src/Editor/Editor.php:396
2 Joomla\CMS\Editor\Editor->getContent() JROOT/administrator/components/com_jevents/views/icalevent/tmpl/edit_uikit.php:229
3 include() JROOT/libraries/src/MVC/View/HtmlView.php:701
4 Joomla\CMS\MVC\View\HtmlView->loadTemplate() JROOT/administrator/components/com_jevents/views/icalevent/tmpl/edit.php:33
5 include() JROOT/libraries/src/MVC/View/HtmlView.php:701
6 Joomla\CMS\MVC\View\HtmlView->loadTemplate() JROOT/libraries/src/MVC/View/HtmlView.php:230
7 Joomla\CMS\MVC\View\HtmlView->display() JROOT/administrator/components/com_jevents/views/abstract/abstract.php:132
8 JEventsAbstractView->display() JROOT/administrator/components/com_jevents/controllers/icalevent.php:511
9 AdminIcaleventController->edit() JROOT/libraries/src/MVC/Controller/BaseController.php:702
10 Joomla\CMS\MVC\Controller\BaseController->execute() JROOT/administrator/components/com_jevents/jevents.php:274
11 require_once() JROOT/libraries/src/Component/ComponentHelper.php:402
12 Joomla\CMS\Component\ComponentHelper::executeComponent() JROOT/libraries/src/Component/ComponentHelper.php:377
13 Joomla\CMS\Component\ComponentHelper::renderComponent() JROOT/libraries/src/Application/AdministratorApplication.php:101
14 Joomla\CMS\Application\AdministratorApplication->dispatch() JROOT/libraries/src/Application/AdministratorApplication.php:159
15 Joomla\CMS\Application\AdministratorApplication->doExecute() JROOT/libraries/src/Application/CMSApplication.php:225
16 Joomla\CMS\Application\CMSApplication->execute() JROOT/administrator/index.php:51