PHP TypeError

Problem/Motivation

Observed the following error logs via Sumo Logic notifications:
TypeError: Argument 1 passed to Drupal\conditional_404_pages\EventSubscriber\ConditionalPageExceptionHtmlSubscriber::on404() must be an instance of Symfony\Component\HttpKernel\Event\ExceptionEvent, instance of Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent given, called in /mnt/www/html/docroot/core/lib/Drupal/Core/EventSubscriber/HttpExceptionSubscriberBase.php on line 109 in /mnt/www/html/docroot/modules/contrib/conditional_404_pages/src/EventSubscriber/ConditionalPageExceptionHtmlSubscriber.php on line 65 #0 /mnt/www/html/docroot/core/lib/Drupal/Core/EventSubscriber/HttpExceptionSubscriberBase.php(109): Drupal\conditional_404_pages\EventSubscriber\ConditionalPageExceptionHtmlSubscriber->on404(Object(Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent))

Steps to reproduce

• Go to a non existing where conditional 404 page is installed and enabled
• Observe temp unavailable error

Proposed resolution

• Investigate handling the correct ExceptionEvent class as noted above in logs.
• As we can see the extended core class uses the GetResponseForExceptionEvent class