How to set up multiple image uploads for users in ckeditor?

Question

PHP

Hello! For the third day I have not configured the loading of images in ck-editor. Loaded extension
MihailDev/yii2-ckeditor , standard widget. It remains to configure it for loading images. I display _form.php

echo $form->field($model, 'body')->widget(CKEditor::className(), [
        'editorOptions' => [
            'filebrowserImageUploadUrl'=> Yii::$app->urlManager->createUrl(['/file-storage/ck-upload']),
            'preset'=>'basic',
            ],
    ]);

Created an action that outputs a string

<script type='text/javascript'>window.parent.CKEDITOR.tools.callFunction('$funcNum', '{$output['fileName']}', '$message');</script>"

all variables are in place, the file is uploaded to the server, but instead of displaying it in the editor after the upload is completed, it displays the following under the button

i.e. what I return from the server. We need the ability to upload images to an article for users with the ability to select multiple files, but here you can’t figure out what’s going on with just one. Please help, maybe there is another solution. Tried with imperavi but it doesn't have multiboot, the new version has it but it hasn't appeared in yii2 yet.