Issue #2692359 by alexpott, nod_: Use core/drupal.dialog.ajax when using data-dialog-type

core/modules/block/block.libraries.yml

@@ -16,4 +16,4 @@ drupal.block.admin:
   dependencies:
     - core/jquery
     - core/drupal
-    - core/drupal.ajax
+    - core/drupal.dialog.ajax

core/modules/config/src/Form/ConfigSync.php

@@ -232,7 +232,7 @@ class ConfigSync extends FormBase {
     $form_state->set('storage_comparer', $storage_comparer);
 
     // Add the AJAX library to the form for dialog support.
-    $form['#attached']['library'][] = 'core/drupal.ajax';
+    $form['#attached']['library'][] = 'core/drupal.dialog.ajax';
 
     foreach ($storage_comparer->getAllCollectionNames() as $collection) {
       if ($collection != StorageInterface::DEFAULT_COLLECTION) {