@bender-tags: 4.17.0, bug, 4888
@bender-ui: collapsed
@bender-ckeditor-plugins: wysiwygarea, toolbar, link, image

1. Open the console.
2. Press "Open dialog" button.

	**Expected** There is a spinner in the dialog's title bar and no errors in the console.

	**Unexpected** There is no spinner in the dialog's title bar or some errors in the console.
3. Close the dialog

	**Expected** No new errors appear in the console.
