Strange oscar behavior

[B.]

Hello!

My name is Stanislav and  I'm using Django==1.8 and Django-oscar==1.2. I've installed the project according to this manual. 

I made some goods in a dashboard, and everything works. 

When I surf my website and don't add any goods to the basket, basket page opens properly. 

If I add any good in the basket, site is still working properly. 

BUT when I enter the basket page, it fails with WSGI error. 

Could you help? Also I posted my question here.

[Thu Apr 14 07:54:40 2016] [error] /home/s/virtualenv/lib/python2.7/site-packages/oscar/apps/customer/app.py:78: RemovedInDjango19Warning: Default value of 'RedirectView.permanent' will change from True to False in Django 1.9. Set an explicit value to silence this warning.
[Thu Apr 14 07:54:40 2016] [error]   url(r'^$', login_required(self.summary_view.as_view()),
[Thu Apr 14 07:54:40 2016] [error] 
[Thu Apr 14 07:54:40 2016] [error] /home/s/virtualenv/lib/python2.7/site-packages/oscar/apps/customer/app.py:137: RemovedInDjango19Warning: Default value of 'RedirectView.permanent' will change from True to False in Django 1.9. Set an explicit value to silence this warning.
[Thu Apr 14 07:54:40 2016] [error]   url='/accounts/notifications/inbox/')),
[Thu Apr 14 07:54:40 2016] [error] 
[Thu Apr 14 07:54:40 2016] [error] /home/s/virtualenv/lib/python2.7/site-packages/oscar/apps/customer/app.py:145: RemovedInDjango19Warning: Default value of 'RedirectView.permanent' will change from True to False in Django 1.9. Set an explicit value to silence this warning.
[Thu Apr 14 07:54:40 2016] [error]   login_required(self.notification_update_view.as_view()),

...

[Thu Apr 14 07:54:48 2016] [error] File "/home/s/virtualenv/lib/python2.7/site-packages/django/http/request.py", line 246, in _load_post_and_files, referer: http://localhost/catalogue/
[Thu Apr 14 07:54:48 2016] [error] if self.method != 'POST':, referer: http://localhost/catalogue/
[Thu Apr 14 07:54:48 2016] [error] AttributeError: 'WSGIRequest' object has no attribute 'method', referer: http://localhost/catalogue/