python 3.x - dictionary update sequence element #0 has length 1; 2 is required. Error during template rendering -

this question has been asked before, answer given doesn't seem work me... have:

valueerror @ /myapp/ dictionary update sequence element #0 has length 1; 2 required  error during template rendering  in template ~/software/myproject/myapp/templates/myapp/base.html, error @ line 53 dictionary update sequence element #0 has length 1; 2 required 

base.html

<a class="brand" href="{% url "about" %}">about page</a> 

error

 file "~/software/myproject/myapp/views/basic.py", line 380, in idx_order     return render(request, 'myapp/index_other.html', {'orders': orders, 'orders_done': orders_done, 'status_choices': dstatus_choices}) 

views.py

def idx_order(request):     orders = order.objects.all().order_by('status','deadline','created','lastupdate').exclude(status=2)     orders_done = order.objects.all().order_by('status','deadline','created','lastupdate').filter(status=2)      return render(request, 'myapp/index_other.html', {         'orders': orders,          'orders_done': orders_done,          'status_choices': dstatus_choices         })  def about(request):     """     function outputs user , system credentials about.html page depending on whether debug = true/false.      """     if settings.debug == true:         stuff          return render(request, 'myapp/about.html',              {'list_zero': list_zero,                 'list_one': list_one,                  'installed_packages_list': library_dict             })     else:             return httpresponse("you shouldn't here :o)") 

urls.py

urlpatterns = [     url(r'^$', idx_order, name='idx_order'),     url(r'^about/$', about, name='about'), 

i'm performing update django1.8 1.11. i'm racking brains can't see mistake lie.