PermissionDeniedException (404)

Message: The URL "/event" has been indexed by the Smartrouter plugin and access throught the unprettified URL has been blocked for security reasons. Visit "/events/ " to view the page.
URL: www.saveachildsheart.ca/event/
User Agent: CCBot/2.0 (https://commoncrawl.org/faq/)
line 305: $smartRouter->correctRouteUrl('/event')
line 251: $smartRouter->findBackupRoute('/event/')
line 205: $smartRouter->findRoute('/event/')
line 239: $smartRouter->route('/event/', true)
line 371: $framework->initializeFields()
line 100: $framework->startApplication()
line 809: $framework->initialize()
line 846: Framework::getFramework()
line 2: Framework::require('/var/www/Nimble/Framework.php')