diff -u b/src/Entity/MiniLayoutAccessControlHandler.php b/src/Entity/MiniLayoutAccessControlHandler.php
--- b/src/Entity/MiniLayoutAccessControlHandler.php
+++ b/src/Entity/MiniLayoutAccessControlHandler.php
@@ -18,7 +18,7 @@
    * {@inheritdoc}
    */
   public function access(EntityInterface $entity, $operation, AccountInterface $account = NULL, $return_as_object = FALSE) {
-    if ($account->hasPermission('access mini layouts')) {
+    if ($account instanceof AccountInterface && $account->hasPermission('access mini layouts')) {
       $result = AccessResult::allowed()->cachePerPermissions();
       return $return_as_object ? $result : $result->isAllowed();
     }