diff --git a/src/Entity/Controller/GroupListBuilder.php b/src/Entity/Controller/GroupListBuilder.php
index fc81351..4600fc7 100644
--- a/src/Entity/Controller/GroupListBuilder.php
+++ b/src/Entity/Controller/GroupListBuilder.php
@@ -70,7 +70,14 @@ class GroupListBuilder extends EntityListBuilder {
     // need to add the render array using the 'data' key.
     $row['name']['data'] = $entity->toLink()->toRenderable();
     $row['type'] = $entity->getGroupType()->label();
-    $row['uid'] = $entity->uid->entity->label();
+    // User can be deleted, and content can be assigned to Anonymous making the
+    // entity not have a correct label anymore.
+    if (isset($entity->uid->entity)) {
+      $row['uid'] = $entity->uid->entity->label();
+    }
+    else {
+      $row['uid'] = $this->t('User does not exist or is deleted.');
+    }
     return $row + parent::buildRow($entity);
   }