404 Not Found

exception 'Omeka\Api\Exception\NotFoundException' with message 'Omeka\Entity\SitePage entity with criteria {"slug":"events","site":1} not found' in /var/www/html/application/src/Api/Adapter/AbstractEntityAdapter.php:512
Stack trace:
#0 /var/www/html/application/src/Api/Adapter/AbstractEntityAdapter.php(330): Omeka\Api\Adapter\AbstractEntityAdapter->findEntity(Array, Object(Omeka\Api\Request))
#1 /var/www/html/application/src/Api/Manager.php(202): Omeka\Api\Adapter\AbstractEntityAdapter->read(Object(Omeka\Api\Request))
#2 /var/www/html/application/src/Api/Manager.php(116): Omeka\Api\Manager->execute(Object(Omeka\Api\Request))
#3 /var/www/html/application/src/Mvc/Controller/Plugin/Api.php(131): Omeka\Api\Manager->read('site_pages', Array, Array, Array)
#4 /var/www/html/application/src/Controller/Site/PageController.php(15): Omeka\Mvc\Controller\Plugin\Api->read('site_pages', Array)
#5 /var/www/html/vendor/zendframework/zend-mvc/src/Controller/AbstractActionController.php(78): Omeka\Controller\Site\PageController->showAction()
#6 /var/www/html/vendor/zendframework/zend-eventmanager/src/EventManager.php(322): Zend\Mvc\Controller\AbstractActionController->onDispatch(Object(Zend\Mvc\MvcEvent))
#7 /var/www/html/vendor/zendframework/zend-eventmanager/src/EventManager.php(179): Zend\EventManager\EventManager->triggerListeners(Object(Zend\Mvc\MvcEvent), Object(Closure))
#8 /var/www/html/vendor/zendframework/zend-mvc/src/Controller/AbstractController.php(105): Zend\EventManager\EventManager->triggerEventUntil(Object(Closure), Object(Zend\Mvc\MvcEvent))
#9 /var/www/html/vendor/zendframework/zend-mvc/src/DispatchListener.php(119): Zend\Mvc\Controller\AbstractController->dispatch(Object(Zend\Http\PhpEnvironment\Request), Object(Zend\Http\PhpEnvironment\Response))
#10 /var/www/html/vendor/zendframework/zend-eventmanager/src/EventManager.php(322): Zend\Mvc\DispatchListener->onDispatch(Object(Zend\Mvc\MvcEvent))
#11 /var/www/html/vendor/zendframework/zend-eventmanager/src/EventManager.php(179): Zend\EventManager\EventManager->triggerListeners(Object(Zend\Mvc\MvcEvent), Object(Closure))
#12 /var/www/html/vendor/zendframework/zend-mvc/src/Application.php(332): Zend\EventManager\EventManager->triggerEventUntil(Object(Closure), Object(Zend\Mvc\MvcEvent))
#13 /var/www/html/index.php(17): Zend\Mvc\Application->run()
#14 {main}