Fix "The Request object has not been set" exception (#8305)

Co-authored-by: Dmitry Ramenev <[email protected]>

Author: dramenev

src/Admin/AbstractAdmin.php

@@ -2267,6 +2267,10 @@ protected function configureDefaultSortValues(array &$sortValues): void
      */
     final protected function appendParentObject(object $object): void
     {
+        if (!$this->hasRequest()) {
+            return;
+        }
+
         if ($this->isChild()) {
             $parentAssociationMapping = $this->getParentAssociationMapping();