mod_wsgi - Error

edit

Hello, I cloned Askbot 0.7.53 from github and deployed it under /var/www/html/askbot-devel on a system running Ubuntu 14.04 with Python 2.7.6.
Then I used pip install -r askbot_requirements.txt and followed the documentation about installing Askbot. When I run python manage.py runserver 127.0.0.1:8500 now everything seems to be fine except these messages in the error log:

/var/www/html/askbot-devel/askbot/skins/utils.py TIME: 2015-09-21 23:36:16,762 MSG: utils.py:get_media_url:159 missing media resource style/extra.css in skin default

Now I am trying to make it run with mod_wsgi. Therefore I compiled mod_wsgi with the installed python to make sure the versions match and added these lines to my 000-default.config for apache:

<VirtualHost *:80>
        ServerName askbot.localhost

        DocumentRoot /var/www/html/askbot-devel
        <Directory /var/www/html/askbot-devel>
            Options Indexes FollowSymLinks MultiViews
            AllowOverride All
            Order allow,deny
            allow from all
        </Directory>

        ##Askbot
        Alias /m/ /var/www/html/askbot-devel/static/
        Alias /upfiles/ /var/www/html/askbot-devel/askbot/upfiles/
        <DirectoryMatch "/var/www/html/askbot-devel/askbot/skins/([^/]+)/media">
            Order deny,allow
            Allow from all
        </DirectoryMatch>
        <DirectoryMatch "/var/www/html/askbot-devel/askbot/upfiles">
            Order deny,allow
            Allow from all
        </DirectoryMatch>
        WSGIDaemonProcess askbot
        WSGIProcessGroup askbot
        WSGIScriptAliasMatch / /var/www/html/askbot-devel/django.wsgi

        ErrorLog ${APACHE_LOG_DIR}/error.log
        CustomLog ${APACHE_LOG_DIR}/access.log combined
 </VirtualHost>

This is what my settings.py looks like:

import os.path
import logging
import sys
import askbot
import site

sys.stderr.write('\n'.join(sorted(sys.path)) + '\n')

ASKBOT_ROOT = os.path.abspath(os.path.dirname(askbot.__file__))
site.addsitedir(os.path.join(ASKBOT_ROOT, 'deps'))

DEBUG = True
TEMPLATE_DEBUG = False
INTERNAL_IPS = ('127.0.0.1',)
ALLOWED_HOSTS = ['*',]

ADMINS = (
    ('Admins', 'bla@bla.bla'),
)

MANAGERS = ADMINS

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql_psycopg2',
        'NAME': '#####',
        'USER': '#####',
        'PASSWORD': '#####',
        'HOST': '',
        'PORT': '', 
        'TEST_CHARSET': 'utf8',
        'TEST_COLLATION': 'utf8_general_ci',
    }
}

SERVER_EMAIL = ''
DEFAULT_FROM_EMAIL = ''
EMAIL_HOST_USER = ''
EMAIL_HOST_PASSWORD = ''
EMAIL_SUBJECT_PREFIX = ''
EMAIL_HOST=''
EMAIL_PORT=''
EMAIL_USE_TLS=False
EMAIL_BACKEND = 'django.core.mail.backends.smtp.EmailBackend'

IMAP_HOST = ''
IMAP_HOST_USER = ''
IMAP_HOST_PASSWORD = ''
IMAP_PORT = ''
IMAP_USE_TLS = False

TIME_ZONE = 'Europe/Berlin'

SITE_ID = 1

USE_I18N = True
LANGUAGE_CODE = 'de'

MEDIA_ROOT = os.path.join(os.path.dirname(__file__), 'askbot', 'upfiles')
MEDIA_URL = '/upfiles/'
STATIC_URL = '/m/'

PROJECT_ROOT = os.path.dirname(__file__)
STATIC_ROOT = os.path.join(PROJECT_ROOT, 'static')

ADMIN_MEDIA_PREFIX = STATIC_URL + 'admin/'

SECRET_KEY = '###########################'

TEMPLATE_LOADERS = (
    'askbot.skins.loaders.Loader',
    'django.template.loaders.app_directories.Loader',
    'django.template.loaders.filesystem.Loader',
)


MIDDLEWARE_CLASSES = (
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'askbot.middleware.anon_user.ConnectToSessionMessagesMiddleware',
    'askbot.middleware.forum_mode.ForumModeMiddleware',
    'askbot.middleware.cancel.CancelActionMiddleware',
    'django.middleware.transaction.TransactionMiddleware',
    'askbot.middleware.view_log.ViewLogMiddleware',
    'askbot.middleware.spaceless.SpacelessMiddleware',
    'askbot.middleware.csrf.CsrfViewMiddleware',
)

ROOT_URLCONF = os.path.basename(os.path.dirname(__file__)) + '.urls'

FILE_UPLOAD_TEMP_DIR = os.path.join(
                                os.path.dirname(__file__),
                                'tmp'
                            ).replace('\\','/')

FILE_UPLOAD_HANDLERS = (
    'django.core.files.uploadhandler.MemoryFileUploadHandler',
    'django.core.files.uploadhandler.TemporaryFileUploadHandler',
)
ASKBOT_ALLOWED_UPLOAD_FILE_TYPES = ('.jpg', '.jpeg', '.gif', '.bmp', '.png', '.tiff')
ASKBOT_MAX_UPLOAD_FILE_SIZE = 1024 * 1024 #result in bytes
DEFAULT_FILE_STORAGE = 'django.core.files.storage.FileSystemStorage'

TEMPLATE_CONTEXT_PROCESSORS = (
    'django.core.context_processors.request',
    'askbot.context.application_settings',
    'askbot.user_messages.context_processors.user_messages',
    'django.contrib.auth.context_processors.auth',
    'django.core.context_processors.csrf',
    'askbot.deps.group_messaging.context.group_messaging_context ...