Django import Error

Environment:


Request Method: GET
Request URL: http://*****.com:8000/

Django Version: 1.3.1
Python Version: 2.7.1
Installed Applications:
['django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.comments',
 'django.contrib.staticfiles',
 'django.contrib.sites',
 'django.contrib.humanize',
 'grappelli',
 'grappelli.dashboard',
 'django.contrib.admin',
 'south',
 'django.contrib.flatpages',
 'crispy_forms',
 'gravatar',
 'social_auth',
 'registration',
 'django_messages',
 'pagination',
 'storages',
 'boto',
 'basic.inlines',
 'basic.blog',
 'basic.media',
 'tagging',
 'django.contrib.markup',
 'basic.tools',
 'endless_pagination',
 'profiles',
 'crowd',
 'medals',
 'notifications',
 'markdown_video']
Installed Middleware:
('django.middleware.common.CommonMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'pagination.middleware.PaginationMiddleware',
 'django.contrib.flatpages.middleware.FlatpageFallbackMiddleware',
 'product.middleware.EulaForce')


Template error:
In template /Users/****/Documents/dev/product/src/Product/templates/index.html, error at line 2
   'project_tags' is not a valid tag library: ImportError raised loading crowd.templatetags.project_tags: No module named models
   1 : {% extends "base_site.html" %}


   2 :  {% load project_tags medal_tags %}


   3 : {% block title %}Product{% endblock %}


   4 : {% block content %}


   5 : {{ message }}


   6 : <div>


   7 :   <div class="row-fluid">


   8 :     {% show_search_form %}


   9 :   </div>


   10 :   <div class="row-fluid">


   11 :       <div class="span2">


   12 :         {% show_category_list %}


Traceback:
File "/env/pfenv/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response
  111.                         response = callback(request, *callback_args, **callback_kwargs)
File "/Users/****/Documents/dev/product/src/Product/views/main.py" in index
  42.                               context_instance=RequestContext(request))
File "/env/pfenv/lib/python2.7/site-packages/django/shortcuts/__init__.py" in render_to_response
  20.     return HttpResponse(loader.render_to_string(*args, **kwargs), **httpresponse_kwargs)
File "/env/pfenv/lib/python2.7/site-packages/django/template/loader.py" in render_to_string
  181.         t = get_template(template_name)
File "/env/pfenv/lib/python2.7/site-packages/django/template/loader.py" in get_template
  157.     template, origin = find_template(template_name)
File "/env/pfenv/lib/python2.7/site-packages/django/template/loader.py" in find_template
  134.             source, display_name = loader(name, dirs)
File "/env/pfenv/lib/python2.7/site-packages/django/template/loader.py" in __call__
  42.         return self.load_template(template_name, template_dirs)
File "/env/pfenv/lib/python2.7/site-packages/django/template/loader.py" in load_template
  48.             template = get_template_from_string(source, origin, template_name)
File "/env/pfenv/lib/python2.7/site-packages/django/template/loader.py" in get_template_from_string
  168.     return Template(source, origin, name)
File "/env/pfenv/lib/python2.7/site-packages/django/template/base.py" in __init__
  108.         self.nodelist = compile_string(template_string, origin)
File "/env/pfenv/lib/python2.7/site-packages/django/template/base.py" in compile_string
  136.     return parser.parse()
File "/env/pfenv/lib/python2.7/site-packages/django/template/base.py" in parse
  239.                     compiled_result = compile_func(self, token)
File "/env/pfenv/lib/python2.7/site-packages/django/template/loader_tags.py" in do_extends
  214.     nodelist = parser.parse()
File "/env/pfenv/lib/python2.7/site-packages/django/template/base.py" in parse
  239.                     compiled_result = compile_func(self, token)
File "/env/pfenv/lib/python2.7/site-packages/django/template/defaulttags.py" in load
  1054.                                           (taglib, e))

Exception Type: TemplateSyntaxError at /
Exception Value: 'project_tags' is not a valid tag library: ImportError raised loading crowd.templatetags.project_tags: No module named models