Django-cms 오류 "+ : 'set'및 'tuple'에 대해 지원되지 않는 피연산자 유형입니다."

Django CMS에서 새 패키지 easy_thumbnails , adminsortable 및 filer를 설치 했지만 웹 사이트에 새 이미지를 추가하고 싶을 때이 오류 페이지가 나타납니다.

TypeError at /en/admin/filer/folder/

unsupported operand type(s) for +: 'set' and 'tuple'

Request Method:     GET
Request URL:    http://127.0.0.1:8000/en/admin/filer/folder/?_popup=1
Django Version:     1.6.5
Exception Type:     TypeError
Exception Value:    

unsupported operand type(s) for +: 'set' and 'tuple'

Exception Location:     /home/tarek/Documents/python/myproject-cms/env/local/lib/python2.7/site-packages/easy_thumbnails/utils.py in valid_processor_options, line 54
Python Executable:  /home/tarek/Documents/python/teknikcloud-cms/env/bin/python
Python Version:     2.7.6
Python Path:    

['/home/tarek/Documents/python/myproject-cms',
 '/home/tarek/Documents/python/myproject-cms/env/src/cms-form-plugin',
 '/home/tarek/Documents/python/myproject-cms/env/lib/python2.7',
 '/home/tarek/Documents/python/myproject-cms/env/lib/python2.7/plat-x86_64-linux-gnu',
 '/home/tarek/Documents/python/myproject-cms/env/lib/python2.7/lib-tk',
 '/home/tarek/Documents/python/myproject-cms/env/lib/python2.7/lib-old',
 '/home/tarek/Documents/python/myproject-cms/env/lib/python2.7/lib-dynload',
 '/usr/lib/python2.7',
 '/usr/lib/python2.7/plat-x86_64-linux-gnu',
 '/usr/lib/python2.7/lib-tk',
 '/home/tarek/Documents/python/myproject-cms/env/local/lib/python2.7/site-packages']

Server time:    Sat, 28 Jun 2014 06:02:50 -0500

그리고 문자열 링크를 넣었습니다.

INSTALLED_APPS = (
    'djangocms_admin_style',
    'djangocms_text_ckeditor',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.admin',
    'django.contrib.sites',
    'django.contrib.sitemaps',
    'django.contrib.staticfiles',
    'django.contrib.messages',
    'cms',
    'mptt',
    'menus',
    'south',
    'sekizai',
    'djangocms_style',
    'djangocms_column',
    'djangocms_file',
    'djangocms_flash',
    'djangocms_googlemap',
    'djangocms_inherit',
    'djangocms_link',
    'djangocms_picture',
    'djangocms_teaser',
    'djangocms_video',
    'reversion',

    'filer',
    'easy_thumbnails',
    'adminsortable',
    #'aldryn_common',
    'easy_select2',
    'parler',

    'cms_form_plugin',
    'widget_tweaks',
    'myapp',
    'myproject',
)

에 settings.py 와 나는에 다음과 같은 라인을 만들어 settings.py 파일을

SOUTH_MIGRATION_MODULES = {
    'easy_thumbnails': 'easy_thumbnails.south_migrations'
}

THUMBNAIL_QUALITY = 95
THUMBNAIL_PROCESSORS = {
    'easy_thumbnails.processors.colorspace',
    'easy_thumbnails.processors.autocrop',
    #'easy_thumbnails.processors.scale_and_crop',
    'filer.thumbnail_processors.scale_and_crop_with_subject_location',
    'easy_thumbnails.processors.filters',
}

THUMBNAIL_PRESERVE_EXTENSIONS = {'png', 'gif',}
THUMBNAIL_SUBDIR = 'versions'

그 후에도 여전히 브라우저에 오류 페이지가 표시됩니다. 설명과 이유가 필요합니다. 감사합니다.