diff --git a/kallithea/controllers/error.py b/kallithea/controllers/error.py
--- a/kallithea/controllers/error.py
+++ b/kallithea/controllers/error.py
@@ -67,6 +67,9 @@ class ErrorController(BaseController):
             c.error_message = cgi.escape(request.GET.get('code',
                                                          str(resp.status)))
             c.error_explanation = self.get_error_explanation(resp.status_int)
+        else:
+            c.error_message = _('No response')
+            c.error_explanation = _('Unknown error')
 
         return render('/errors/error_document.html')