diff -ru kde4libs-4.14.6-orig/kioslave/http/http.cpp kde4libs-4.14.6/kioslave/http/http.cpp
--- kde4libs-4.14.6-orig/kioslave/http/http.cpp	2015-02-27 01:12:48.000000000 +0100
+++ kde4libs-4.14.6/kioslave/http/http.cpp	2015-09-29 07:17:21.196537191 +0200
@@ -5493,7 +5493,9 @@
                     if (!authTokens.isEmpty()) {
                         goto try_next_auth_scheme;
                     } else {
-                        error(ERR_UNSUPPORTED_ACTION, i18n("Authorization failed."));
+                        if (!sendErrorPageNotification()) {
+                          error(ERR_UNSUPPORTED_ACTION, i18n("Authorization failed."));
+                        }
                         authRequiresAnotherRoundtrip = false;
                     }
                     //### return false; ?