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TypeError: Argument 1 passed to Drupal\Core\Entity\EntityViewBuilder::view() must implement interface Drupal\Core\Entity\EntityInterface, null given, called in /home/researcher.sci.am/reshost/WWW/web/modules/custom/armres_modal/src/Controller/ArmresModal.php on line 21 in Drupal\Core\Entity\EntityViewBuilder->view() (line 122 of core/lib/Drupal/Core/Entity/EntityViewBuilder.php).