The view apps.cloudmanager.views.import_namespace_view didn't return an HttpResponse object. It returned None instead.

django_code/apps/cloudmanager/views.py

@@ -33,7 +33,9 @@ def hello(request):
 
 def import_namespace_view(request):
     import_namespace()
-    
+    return HttpResponse('<h1>Namespace imported!</h1>')
+
+
 def redirect(request):
     db_host = os.environ.get('DB_HOST')
     db_port = os.environ.get('DB_PORT')