Django admin: Cropping using ImageRatioField on FilerImageField give errors

When I am doing cropping using ImageField and ImageRatioField it working well for me but I have to do it with FilerImageField than it will not work for me.

class FeatureArticle(models.Model):
     featured_listing_image = models.ImageField(
        null=True,
        blank=True,
        upload_to=featured_listing_image_directory_path,
        verbose_name=_('Feature listing image'),
        help_text=_('Feature listing image of article.'),
    )

    featured_listing_image_cropping = ImageRatioField('featured_listing_image', '433x309', allow_fullsize=True, free_crop=False)

    featured_listing_image_latest = FilerImageField(
        null=True,
        blank=True,
        verbose_name=_('Featured listing image latest'),
        help_text=_('Featured listing latest image of Article.')
    )

    featured_listing_image_latest_cropping = ImageRatioField('featured_listing_image_latest', '433x309', allow_fullsize=True,free_crop=False)

    @property
    def cropped_feature_listing_image(self):
        if self.featured_listing_image:
            featured_listing_image = self.featured_listing_image.url
            image_name = featured_listing_image.split('/')[-1].split('.')[0]
            featured_listing_image = featured_listing_image.replace(image_name, image_name + '_crop')
            return featured_listing_image
        return ''

from django.contrib import admin
from .model import FeatureArticle
from image_cropping import ImageCroppingMixin

class FeatureArticleInline(ImageCroppingMixin, admin.StackedInline):
    model = FeatureArticle
    max_num = 0
    fieldsets = (
        (_('Featured Image'), {
            'fields': (
                'featured_listing_image',
                'featured_listing_image_cropping',
                'featured_listing_image_latest',
                'featured_listing_image_latest_cropping'
            ),
        }),
    )

But It will give error of when I trying using FilerImageField.

Error: There's no widget registered to the class FilerImageField.

Please give me a solutions of cropping of image possible with this two field type?

Thanks in advance.

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