Hi! - So I'm trying to add djangocms_blog to my website. Most of the dependences have loaded without issues, but two I'm struggling with: filer and djangocms_blog. The traceback (when enabling 'djangocms_blog') is below:

Exception in thread django-main-thread:

Traceback (most recent call last):

File "/usr/lib/python3.7/threading.py", line 917, in _bootstrap_inner

self.run()

File "/usr/lib/python3.7/threading.py", line 865, in run

self._target(*self._args, **self._kwargs)

File "/usr/local/lib/python3.7/dist-packages/django/utils/autoreload.py", line 54, in wrapper

fn(*args, **kwargs)

File "/usr/local/lib/python3.7/dist-packages/django/core/management/commands/runserver.py", line 109, in inner_run

autoreload.raise_last_exception()

File "/usr/local/lib/python3.7/dist-packages/django/utils/autoreload.py", line 77, in raise_last_exception

raise _exception[1]

File "/usr/local/lib/python3.7/dist-packages/django/core/management/__init__.py", line 337, in execute

autoreload.check_errors(django.setup)()

File "/usr/local/lib/python3.7/dist-packages/django/utils/autoreload.py", line 54, in wrapper

fn(*args, **kwargs)

File "/usr/local/lib/python3.7/dist-packages/django/__init__.py", line 24, in setup

apps.populate(settings.INSTALLED_APPS)

File "/usr/local/lib/python3.7/dist-packages/django/apps/registry.py", line 116, in populate

app_config.import_models()

File "/usr/local/lib/python3.7/dist-packages/django/apps/config.py", line 211, in import_models

self.models_module = import_module(models_module_name)

File "/usr/lib/python3.7/importlib/__init__.py", line 127, in import_module

return _bootstrap._gcd_import(name[level:], package, level)

File "<frozen importlib.\_bootstrap>", line 1006, in _gcd_import

File "<frozen importlib.\_bootstrap>", line 983, in _find_and_load

File "<frozen importlib.\_bootstrap>", line 967, in _find_and_load_unlocked

File "<frozen importlib.\_bootstrap>", line 677, in _load_unlocked

File "<frozen importlib.\_bootstrap\_external>", line 728, in exec_module

File "<frozen importlib.\_bootstrap>", line 219, in _call_with_frames_removed

File "/usr/local/lib/python3.7/dist-packages/djangocms_blog/models.py", line 188, in <module>

class Post(KnockerModel, BlogMetaMixin, TranslatableModel):

File "/usr/local/lib/python3.7/dist-packages/djangocms_blog/models.py", line 206, in Post

related_name='djangocms_blog_post_image')

File "/usr/local/lib/python3.7/dist-packages/filer/fields/file.py", line 127, in __init__

dfl = get_model_label(self.default_model_class)

File "/usr/local/lib/python3.7/dist-packages/filer/utils/model_label.py", line 21, in get_model_label

model._meta.app_label,

AttributeError: 'bool' object has no attribute '_meta'

settings.py
import os
gettext = lambda s: s
PROJECT_PATH = os.path.split(os.path.abspath(os.path.dirname(__file__)))[0]
# Build paths inside the project like this: os.path.join(BASE_DIR, ...)
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__))

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = ..

# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = True

ALLOWED_HOSTS = [

# Application definition
INSTALLED_APPS = [
    'Predictor.apps.PredictorConfig',
    'djangocms_admin_style',
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'django.contrib.admindocs',
    'django_celery_beat',
    'django.contrib.sites',
    'bootstrap4',
    'jquery',
    'filer',
    'cms',
    'mptt',  # utilities for implementing a modified pre-order traversal tree
     'menus',  # helper for model independent hierarchical website navigation
    'sekizai',  # for javascript and css management
    'treebeard',
    'easy_thumbnails',
    #---------------------
    'djangocms_text_ckeditor',
'aldryn_apphooks_config',
    'parler',
    'taggit',
    'taggit_autosuggest',
    'meta',
    'sortedm2m',
    'djangocms_blog',
    #'djangocms_link',
 #'djangocms_file',
    #'djangocms_picture',
    #'djangocms_video',
#'djangocms_googlemap',
    #'djangocms_snippet',
    #'djangocms_style',
 #'djangocms_column',
 #'djangocms_icon',
#'djangocms_bootstrap4',

#'djangocms_bootstrap4.contrib.bootstrap4_alerts',
#'djangocms_bootstrap4.contrib.bootstrap4_badge',
#'djangocms_bootstrap4.contrib.bootstrap4_card',
#'djangocms_bootstrap4.contrib.bootstrap4_carousel',
#'djangocms_bootstrap4.contrib.bootstrap4_collapse',
#'djangocms_bootstrap4.contrib.bootstrap4_content',
#'djangocms_bootstrap4.contrib.bootstrap4_grid',
#'djangocms_bootstrap4.contrib.bootstrap4_jumbotron',
#'djangocms_bootstrap4.contrib.bootstrap4_link',
#'djangocms_bootstrap4.contrib.bootstrap4_listgroup',
#'djangocms_bootstrap4.contrib.bootstrap4_media',
#'djangocms_bootstrap4.contrib.bootstrap4_picture',
#'djangocms_bootstrap4.contrib.bootstrap4_tabs',
#'djangocms_bootstrap4.contrib.bootstrap4_utilities',
]
FILER_IMAGE_MODEL = False
THUMBNAIL_HIGH_RESOLUTION = True

THUMBNAIL_PROCESSORS = (
    'easy_thumbnails.processors.colorspace',
    'easy_thumbnails.processors.autocrop',
    'filer.thumbnail_processors.scale_and_crop_with_subject_location',
    'easy_thumbnails.processors.filters'
)
SITE_ID=1
MIDDLEWARE = [
    'cms.middleware.utils.ApphookReloadMiddleware',
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.locale.LocaleMiddleware',
    #'django.middleware.doc.XViewMiddleware',
    'cms.middleware.page.CurrentPageMiddleware',
    'cms.middleware.user.CurrentUserMiddleware',
    'cms.middleware.toolbar.ToolbarMiddleware',
    'cms.middleware.language.LanguageCookieMiddleware',    
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
]
TEMPLATE_CONTEXT_PROCESSORS = (
    'django.contrib.auth.context_processors.auth',
    'django.contrib.messages.context_processors.messages',
    #'django.core.context_processors'
    'django.core.context_processors.i18n',
    #'django.core.context_processors.request',
    #'django.core.context_processors.media',
    #'django.core.context_processors.static',
    'cms.context_processors.cms_settings',
   # 'sekizai.context_processors.sekizai',
)
BROKER_URL = '//localhost:6379'
CELERY_RESULT_BACKEND = 'redis://localhost:6379'
CELERY_ACCEPT_CONTENT = ['application/json']
CELERY_TASK_SERIALIZER = 'json'
CELERY_RESULT_SERIALIZER = 'json'
CELERY_TIMEZONE = 'Europe/London'

X_FRAME_OPTIONS = 'SAMEORIGIN'
ROOT_URLCONF = 'Website.urls'

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': ['templates'],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
                #'django.core.context_processors.i18n',
                'django.template.context_processors.request',
                #'django.core.context_processors.media',
                #'django.core.context_processors.static',
                'cms.context_processors.cms_settings',
                'sekizai.context_processors.sekizai',
            ],
        },
    },
]
TEMPLATE_DIRS = (
    # The docs say it should be absolute path: PROJECT_PATH is precisely one.
    # Life is wonderful!
    os.path.join(PROJECT_PATH, "templates"),
)
CMS_TEMPLATES = [
    ('home.html', 'Home page template'),
        ('fullwidth.html', 'Fullwidth'),
    ('sidebar_left.html', 'Sidebar Left'),
    ('sidebar_right.html', 'Sidebar Right')
]
WSGI_APPLICATION = 'Website.wsgi.application'

LANGUAGES = [
    ('en-gb', 'English'),
]


DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
    }
}

# Password validation
# https://docs.djangoproject.com/en/3.0/ref/settings/#auth-password-validators

AUTH_PASSWORD_VALIDATORS = [
    {
        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
    },
]


# Internationalization
# https://docs.djangoproject.com/en/3.0/topics/i18n/

LANGUAGE_CODE = 'en-gb'

TIME_ZONE = 'UTC'

USE_I18N = True

USE_L10N = True

USE_TZ = True


# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/3.0/howto/static-files/
STATIC_ROOT = os.path.join(PROJECT_PATH, "static")
STATIC_URL = '/static/'
MEDIA_ROOT = os.path.join(PROJECT_PATH, "media")
MEDIA_URL = "/media/"
# Custom

Unfortunately it's an error which doesn't seem exactly clear on the root cause... The error disappears when I comment out filer and djangocms_blog. Not sure what it could be, so any help on troubleshooting this would be great. Thanks!