How to display pictures on zxbodya/yii2-gallery-manager in advanced?

Question

Yii

Good afternoon. Installed the zxbodya/yii2-gallery-manager extension on the site. The problem is that this extension saves images in backend/web, and the output path is specified from frontend/web. I tried in every possible way to rewrite the url or create another directory for saving, but the pictures simply do not appear. Maybe someone faced this problem?

use zxbodya\yii2\galleryManager\GalleryBehavior;

class Product extends \yii\db\ActiveRecord 
{
...
public function behaviors()
{
    return [
         'galleryBehavior' => [
             'class' => GalleryBehavior::className(),
             'type' => 'product',
             'extension' => 'jpg',
             'directory' => Yii::getAlias('@webroot') . '/images/product/gallery',
             'url' => Yii::getAlias('@web') . '/images/product/gallery',
             'versions' => [
                 'small' => function ($img) {
                     /** @var \Imagine\Image\ImageInterface $img */
                     return $img
                         ->copy()
                         ->thumbnail(new \Imagine\Image\Box(200, 200));
                 },
                 'medium' => function ($img) {
                     /** @var \Imagine\Image\ImageInterface $img */
                     $dstSize = $img->getSize();
                     $maxWidth = 800;
                     if ($dstSize->getWidth() > $maxWidth) {
                         $dstSize = $dstSize->widen($maxWidth);
                     }
                     return $img
                         ->copy()
                         ->resize($dstSize);
                 },
             ]
         ]
    ];
}

I use advanced application