title: After installing fobi from https://pypi.org/project/django-fobi/ and try localhost:8000/admin getting error
body: <p>I followed the <a href="https://pypi.org/project/django-fobi/" rel="nofollow noreferrer">https://pypi.org/project/django-fobi/</a>  instalation instructions, and after pip install django-fobi into my venv I set my settings.py as follows</p>
  <pre><code>INSTALLED_APPS = [
      'dose.apps.DoseConfig',
      'django.contrib.admin',
      'django.contrib.contenttypes',
       # Used by fobi
      'django.contrib.auth',
      'django.contrib.sessions',
      'django.contrib.sites',
      'django.contrib.messages',
      'django.contrib.staticfiles',
      'rest_framework',
      'aiengine',
      'fobi',
      # `django-fobi` themes
      'fobi.contrib.themes.bootstrap3', # Bootstrap 3 theme
      'fobi.contrib.themes.foundation5', # Foundation 5 theme
      'fobi.contrib.themes.simple', # Simple theme
      # `django-fobi` form elements - fields
      'fobi.contrib.plugins.form_elements.fields.boolean',
      'fobi.contrib.plugins.form_elements.fields.checkbox_select_multiple',
      'fobi.contrib.plugins.form_elements.fields.date',
      'fobi.contrib.plugins.form_elements.fields.date_drop_down',
      'fobi.contrib.plugins.form_elements.fields.datetime',
      'fobi.contrib.plugins.form_elements.fields.decimal',
      'fobi.contrib.plugins.form_elements.fields.email',
      'fobi.contrib.plugins.form_elements.fields.file',
      'fobi.contrib.plugins.form_elements.fields.float',
      'fobi.contrib.plugins.form_elements.fields.hidden',
      'fobi.contrib.plugins.form_elements.fields.input',
      'fobi.contrib.plugins.form_elements.fields.integer',
      'fobi.contrib.plugins.form_elements.fields.ip_address',
      'fobi.contrib.plugins.form_elements.fields.null_boolean',
      'fobi.contrib.plugins.form_elements.fields.password',
      'fobi.contrib.plugins.form_elements.fields.radio',
      'fobi.contrib.plugins.form_elements.fields.regex',
      'fobi.contrib.plugins.form_elements.fields.select',
      'fobi.contrib.plugins.form_elements.fields.select_model_object',
      'fobi.contrib.plugins.form_elements.fields.select_multiple',
      'fobi.contrib.plugins.form_elements.fields.select_multiple_model_objects',
      'fobi.contrib.plugins.form_elements.fields.slug',
      'fobi.contrib.plugins.form_elements.fields.text',
      'fobi.contrib.plugins.form_elements.fields.textarea',
      'fobi.contrib.plugins.form_elements.fields.time',
      'fobi.contrib.plugins.form_elements.fields.url',
      # `django-fobi` form elements - content elements
      'fobi.contrib.plugins.form_elements.test.dummy',
      'easy_thumbnails', # Required by `content_image` plugin
      'fobi.contrib.plugins.form_elements.content.content_image',
      'fobi.contrib.plugins.form_elements.content.content_image_url',
      'fobi.contrib.plugins.form_elements.content.content_text',
      'fobi.contrib.plugins.form_elements.content.content_video',
  
      # `django-fobi` form handlers
      'fobi.contrib.plugins.form_handlers.db_store',
      'fobi.contrib.plugins.form_handlers.http_repost',
      'fobi.contrib.plugins.form_handlers.mail',
      'fobi.contrib.plugins.form_handlers.mail_sender',
  
  ]
  </code></pre>
  <p>and I edited <code>mysite.urls.py</code></p>
  <pre><code>urlpatterns = [
      path('instruction/', InstructionListView.as_view()),
      path('dose/', include('dose.urls')),
      path('admin/', admin.site.urls),
      # View URLs
      re_path(r'^fobi/', include('fobi.urls.view')),
  
      # Edit URLs
      re_path(r'^fobi/', include('fobi.urls.edit')),
      # DB Store plugin URLs
      re_path(r'^fobi/plugins/form-handlers/db-store/',
          include('fobi.contrib.plugins.form_handlers.db_store.urls')),
      
  </code></pre>
  <p>I get this error on runserver it was all working before installing fobi</p>
  <pre><code>  File &quot;C:\Users\viter\base\dosehomev3\dosehome\venv\lib\site-packages\django\contrib\sites\models.py&quot;, line 39, in _get_site_by_request
      SITE_CACHE[host] = self.get(domain__iexact=host)
    File &quot;C:\Users\viter\base\dosehomev3\dosehome\venv\lib\site-packages\django\db\models\manager.py&quot;, line 85, in manager_method
      return getattr(self.get_queryset(), name)(*args, **kwargs)
    File &quot;C:\Users\viter\base\dosehomev3\dosehome\venv\lib\site-packages\django\db\models\query.py&quot;, 
  line 650, in get
      raise self.model.DoesNotExist(
  django.contrib.sites.models.Site.DoesNotExist: Site matching query does not exist.
  
  </code></pre>
  <p>I expected to get a login window. It was working before installing fobi</p>
  <p>but instead got this error screen I could not find any deviation from the fobi documentation.</p>
  <pre><code>DoesNotExist at /admin/login/
  Site matching query does not exist.
  Request Method: GET
  Request URL:    http://localhost:8000/admin/login/?next=/admin/
  Django Version: 4.1
  Exception Type: DoesNotExist
  Exception Value:    
  Site matching query does not exist.
  Exception Location: C:\Users\viter\base\dosehomev3\dosehome\venv\lib\site-packages\django\db\models\query.py, line 650, in get
  Raised during:  django.contrib.admin.sites.login
  Python Executable:  C:\Users\viter\base\dosehomev3\dosehome\venv\Scripts\python.exe
  Python Version: 3.10.6
  Python Path:    
  ['C:\\Users\\viter\\base\\dosehomev3\\dosehome',
   'C:\\Program '
   'Files\\WindowsApps\\PythonSoftwareFoundation.Python.3.10_3.10.1776.0_x64__qbz5n2kfra8p0\\python310.zip',
   'C:\\Program '
   'Files\\WindowsApps\\PythonSoftwareFoundation.Python.3.10_3.10.1776.0_x64__qbz5n2kfra8p0\\DLLs',
   'C:\\Program '
   'Files\\WindowsApps\\PythonSoftwareFoundation.Python.3.10_3.10.1776.0_x64__qbz5n2kfra8p0\\lib',
   'C:\\Users\\viter\\AppData\\Local\\Microsoft\\WindowsApps\\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0',
   'C:\\Users\\viter\\base\\dosehomev3\\dosehome\\venv',
   'C:\\Users\\viter\\base\\dosehomev3\\dosehome\\venv\\lib\\site-packages']
  Server time:    Fri, 09 Sep 2022 09:39:48 +0000
  </code></pre>