Issue #3363362: Check if revision entity exist.

src/Plugin/QueueWorker/NodeRevisionDelete.php

@@ -95,6 +95,10 @@ class NodeRevisionDelete extends QueueWorkerBase implements ContainerFactoryPlug
       /** @var \Drupal\node\NodeInterface $revision */
       $revision = $this->entityTypeManager->getStorage('node')->loadRevision($vid);
 
+      if (!$revision instanceof NodeInterface) {
+        break;
+      }
+
       // We have to track revisions per language, otherwise unexpected behavior
       // and even loss of data might occur. Try to find the revision language
       // by checking which translation was affected.