[OpenSlides users-de] openslides geht nicht mehr aufzurufen - Ubuntu 14.04

[Alex.]

Hallo,

ich habe heute openslides auf meinem Laptop mit Ubuntu 14.04, 
entsprechend der Readme installiert. Es hat geklappt und das Progamm 
startete.

Nun kann ich es aber nicht mehr aufrufen - Terminal openslides. Kennt 
jemand den Grund?

Vielen Dank!

Alex.

alexander at cofraterna:~$ sudo apt-get install python-dev
[sudo] password for alexander:
Paketlisten werden gelesen... Fertig
Abhängigkeitsbaum wird aufgebaut.
Statusinformationen werden eingelesen.... Fertig
python-dev ist schon die neueste Version.
0 aktualisiert, 0 neu installiert, 0 zu entfernen und 0 nicht aktualisiert.
alexander at cofraterna:~$ sudo apt-get install python-virtualenv
Paketlisten werden gelesen... Fertig
Abhängigkeitsbaum wird aufgebaut.
Statusinformationen werden eingelesen.... Fertig
python-virtualenv ist schon die neueste Version.
0 aktualisiert, 0 neu installiert, 0 zu entfernen und 0 nicht aktualisiert.
alexander at cofraterna:~$ mkdir OpenSlides
mkdir: das Verzeichnis »OpenSlides“ kann nicht angelegt werden: Die
Datei existiert bereits
alexander at cofraterna:~$ cd OpenSlides
alexander at cofraterna:~/OpenSlides$ virtualenv .virtualenv
New python executable in .virtualenv/bin/python
Installing setuptools, pip...done.
alexander at cofraterna:~/OpenSlides$ source .virtualenv/bin/activate
(.virtualenv)alexander at cofraterna:~/OpenSlides$ pip install openslides
Requirement already satisfied (use --upgrade to upgrade): openslides in
./.virtualenv/lib/python2.7/site-packages
Requirement already satisfied (use --upgrade to upgrade):
Django>=1.5,<1.7 in ./.virtualenv/lib/python2.7/site-packages (from
openslides)
Requirement already satisfied (use --upgrade to upgrade):
beautifulsoup4>=4.3,<4.4 in ./.virtualenv/lib/python2.7/site-packages
(from openslides)
Requirement already satisfied (use --upgrade to upgrade):
bleach>=1.2,<1.5 in ./.virtualenv/lib/python2.7/site-packages (from
openslides)
Requirement already satisfied (use --upgrade to upgrade):
django-ckeditor-updated>=4.2,<4.3 in
./.virtualenv/lib/python2.7/site-packages (from openslides)
Requirement already satisfied (use --upgrade to upgrade):
django-haystack>=2.1,<2.4 in ./.virtualenv/lib/python2.7/site-packages
(from openslides)
Requirement already satisfied (use --upgrade to upgrade):
django-mptt>=0.6,<0.7 in ./.virtualenv/lib/python2.7/site-packages (from
openslides)
Requirement already satisfied (use --upgrade to upgrade):
jsonfield>=0.9,<0.10 in ./.virtualenv/lib/python2.7/site-packages (from
openslides)
Requirement already satisfied (use --upgrade to upgrade):
natsort>=3.2,<3.3 in ./.virtualenv/lib/python2.7/site-packages (from
openslides)
Requirement already satisfied (use --upgrade to upgrade):
reportlab>=2.7,<2.8 in ./.virtualenv/lib/python2.7/site-packages (from
openslides)
Requirement already satisfied (use --upgrade to upgrade):
roman>=2.0,<2.1 in ./.virtualenv/lib/python2.7/site-packages (from
openslides)
Requirement already satisfied (use --upgrade to upgrade):
setuptools>=2.1,<3.7 in ./.virtualenv/lib/python2.7/site-packages (from
openslides)
Requirement already satisfied (use --upgrade to upgrade):
sockjs-tornado>=1.0,<1.1 in ./.virtualenv/lib/python2.7/site-packages
(from openslides)
Requirement already satisfied (use --upgrade to upgrade):
tornado>=3.1,<3.3 in ./.virtualenv/lib/python2.7/site-packages (from
openslides)
Requirement already satisfied (use --upgrade to upgrade):
whoosh>=2.5.6,<2.6 in ./.virtualenv/lib/python2.7/site-packages (from
openslides)
Requirement already satisfied (use --upgrade to upgrade):
argparse==1.2.1 in /usr/lib/python2.7 (from openslides)
Requirement already satisfied (use --upgrade to upgrade):
backports.ssl-match-hostname in
./.virtualenv/lib/python2.7/site-packages (from
tornado>=3.1,<3.3->openslides)
Cleaning up...
(.virtualenv)alexander at cofraterna:~/OpenSlides$

alexander at cofraterna:~$ openslides
Traceback (most recent call last):
   File "/usr/local/bin/openslides", line 9, in <module>
     load_entry_point('openslides==2.0a1', 'console_scripts',
'openslides')()
   File "/usr/local/lib/python2.7/dist-packages/openslides/__main__.py",
line 41, in main
     known_args.callback(known_args)
   File "/usr/local/lib/python2.7/dist-packages/openslides/__main__.py",
line 136, in start
     execute_from_command_line(['manage.py', 'migrate'])
   File
"/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py",
line 385, in execute_from_command_line
     utility.execute()
   File
"/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py",
line 345, in execute
     settings.INSTALLED_APPS
   File
"/usr/local/lib/python2.7/dist-packages/django/conf/__init__.py", line
46, in __getattr__
     self._setup(name)
   File
"/usr/local/lib/python2.7/dist-packages/django/conf/__init__.py", line
42, in _setup
     self._wrapped = Settings(settings_module)
   File
"/usr/local/lib/python2.7/dist-packages/django/conf/__init__.py", line
94, in __init__
     mod = importlib.import_module(self.SETTINGS_MODULE)
   File "/usr/lib/python2.7/importlib/__init__.py", line 37, in
import_module
     __import__(name)
   File "/home/alexander/.config/openslides/settings.py", line 45, in
<module>
     filesystem2unicode(os.path.join(SITE_ROOT, 'templates')))
NameError: name 'filesystem2unicode' is not defined
alexander at cofraterna:~$