Omeka S encountered an error

Omeka\Api\Exception\NotFoundException
Omeka\Entity\Media entity with criteria {"id":"19656"} not found

Details:

Omeka\Api\Exception\NotFoundException: Omeka\Entity\Media entity with criteria {"id":"19656"} not found in /opt/omeka-s/application/src/Api/Adapter/AbstractEntityAdapter.php:709
Stack trace:
#0 /opt/omeka-s/application/src/Api/Adapter/AbstractEntityAdapter.php(427): Omeka\Api\Adapter\AbstractEntityAdapter->findEntity()
#1 /opt/omeka-s/application/src/Api/Manager.php(230): Omeka\Api\Adapter\AbstractEntityAdapter->read()
#2 /opt/omeka-s/application/src/Api/Manager.php(115): Omeka\Api\Manager->execute()
#3 /opt/omeka-s/modules/OmekaRobotsDotTxt/Module.php(246): Omeka\Api\Manager->read()
#4 /opt/omeka-s/vendor/laminas/laminas-eventmanager/src/EventManager.php(321): OmekaRobotsDotTxt\Module->addDirectiveToMedia()
#5 /opt/omeka-s/vendor/laminas/laminas-eventmanager/src/EventManager.php(170): Laminas\EventManager\EventManager->triggerListeners()
#6 /opt/omeka-s/application/src/View/Helper/Trigger.php(60): Laminas\EventManager\EventManager->triggerEvent()
#7 [internal function]: Omeka\View\Helper\Trigger->__invoke()
#8 /opt/omeka-s/vendor/laminas/laminas-view/src/Renderer/PhpRenderer.php(396): call_user_func_array()
#9 /opt/omeka-s/themes/OmekaThemeUWLawV3/view/layout/layout.phtml(25): Laminas\View\Renderer\PhpRenderer->__call()
#10 /opt/omeka-s/vendor/laminas/laminas-view/src/Renderer/PhpRenderer.php(505): include('/opt/omeka-s/th...')
#11 /opt/omeka-s/index.php(36): Laminas\View\Renderer\PhpRenderer->render()
#12 {main}