Hi, I hope you might give some light. I'm trying to setup saml2saml. Everything works fine when samlBackend gets metadata with only one IdP. When there is more then I'm getting error. backends/saml2_backend.yaml is based saml2_backend.yaml.example I would be very much appreciated for any help. ############################ jagger_satosa.1.niwh0x0v4r34 at totoro | [2020-06-18 14:44:26,978] [DEBUG] [satosa.routing.backend_routing] [urn:uuid:4391da61-03e6-44c3-b706-2f31694b9b33] Routing to backend: Saml2 jagger_satosa.1.niwh0x0v4r34 at totoro | [2020-06-18 14:44:26,978] [INFO] [satosa.backends.saml2.get_idp_entity_id] [urn:uuid:4391da61-03e6-44c3-b706-2f31694b9b33] {'message': 'Selected IdP', 'only_one': False, 'target_entity_id': None, 'force_authn': None, 'memorized_idp': False, 'entity_id': None} agger_satosa.1.niwh0x0v4r34 at totoro | [2020-06-18 14:44:26,979] [ERROR] [satosa.base.run] [urn:uuid:4391da61-03e6-44c3-b706-2f31694b9b33] Uncaught exception jagger_satosa.1.niwh0x0v4r34 at totoro | Traceback (most recent call last): jagger_satosa.1.niwh0x0v4r34 at totoro | File "/src/satosa/src/satosa/base.py", line 240, in run jagger_satosa.1.niwh0x0v4r34 at totoro | resp = self._run_bound_endpoint(context, spec) jagger_satosa.1.niwh0x0v4r34 at totoro | File "/src/satosa/src/satosa/base.py", line 180, in _run_bound_endpoint jagger_satosa.1.niwh0x0v4r34 at totoro | return spec(context) jagger_satosa.1.niwh0x0v4r34 at totoro | File "/src/satosa/src/satosa/frontends/saml2.py", line 100, in handle_authn_request jagger_satosa.1.niwh0x0v4r34 at totoro | return self._handle_authn_request(context, binding_in, self.idp) jagger_satosa.1.niwh0x0v4r34 at totoro | File "/src/satosa/src/satosa/frontends/saml2.py", line 256, in _handle_authn_request jagger_satosa.1.niwh0x0v4r34 at totoro | return self.auth_req_callback_func(context, internal_req) jagger_satosa.1.niwh0x0v4r34 at totoro | File "/src/satosa/src/satosa/base.py", line 103, in _auth_req_callback_func jagger_satosa.1.niwh0x0v4r34 at totoro | return self._auth_req_finish(context, internal_request) jagger_satosa.1.niwh0x0v4r34 at totoro | File "/src/satosa/src/satosa/base.py", line 108, in _auth_req_finish jagger_satosa.1.niwh0x0v4r34 at totoro | return backend.start_auth(context, internal_request) jagger_satosa.1.niwh0x0v4r34 at totoro | File "/src/satosa/src/satosa/backends/saml2.py", line 179, in start_auth jagger_satosa.1.niwh0x0v4r34 at totoro | return self.disco_query(context) jagger_satosa.1.niwh0x0v4r34 at totoro | File "/src/satosa/src/satosa/backends/saml2.py", line 211, in disco_query jagger_satosa.1.niwh0x0v4r34 at totoro | disco_url, self.sp.config.entityid, **args jagger_satosa.1.niwh0x0v4r34 at totoro | File "/opt/satosa/lib/python3.7/site-packages/saml2/client_base.py", line 936, in create_discovery_service_request jagger_satosa.1.niwh0x0v4r34 at totoro | if '?' in url: jagger_satosa.1.niwh0x0v4r34 at totoro | TypeError: argument of type 'NoneType' is not iterable jagger_satosa.1.niwh0x0v4r34 at totoro | [2020-06-18 14:44:26,980] [ERROR] [satosa.proxy_server.__call__] Unknown error jagger_satosa.1.niwh0x0v4r34 at totoro | Traceback (most recent call last): jagger_satosa.1.niwh0x0v4r34 at totoro | File "/src/satosa/src/satosa/base.py", line 240, in run jagger_satosa.1.niwh0x0v4r34 at totoro | resp = self._run_bound_endpoint(context, spec) jagger_satosa.1.niwh0x0v4r34 at totoro | File "/src/satosa/src/satosa/base.py", line 180, in _run_bound_endpoint jagger_satosa.1.niwh0x0v4r34 at totoro | return spec(context) jagger_satosa.1.niwh0x0v4r34 at totoro | File "/src/satosa/src/satosa/frontends/saml2.py", line 100, in handle_authn_request jagger_satosa.1.niwh0x0v4r34 at totoro | return self._handle_authn_request(context, binding_in, self.idp) jagger_satosa.1.niwh0x0v4r34 at totoro | File "/src/satosa/src/satosa/frontends/saml2.py", line 256, in _handle_authn_request jagger_satosa.1.niwh0x0v4r34 at totoro | return self.auth_req_callback_func(context, internal_req) jagger_satosa.1.niwh0x0v4r34 at totoro | File "/src/satosa/src/satosa/base.py", line 103, in _auth_req_callback_func jagger_satosa.1.niwh0x0v4r34 at totoro | return self._auth_req_finish(context, internal_request) jagger_satosa.1.niwh0x0v4r34 at totoro | File "/src/satosa/src/satosa/base.py", line 108, in _auth_req_finish jagger_satosa.1.niwh0x0v4r34 at totoro | return backend.start_auth(context, internal_request) jagger_satosa.1.niwh0x0v4r34 at totoro | File "/src/satosa/src/satosa/backends/saml2.py", line 179, in start_auth jagger_satosa.1.niwh0x0v4r34 at totoro | return self.disco_query(context) jagger_satosa.1.niwh0x0v4r34 at totoro | File "/src/satosa/src/satosa/backends/saml2.py", line 211, in disco_query jagger_satosa.1.niwh0x0v4r34 at totoro | disco_url, self.sp.config.entityid, **args jagger_satosa.1.niwh0x0v4r34 at totoro | File "/opt/satosa/lib/python3.7/site-packages/saml2/client_base.py", line 936, in create_discovery_service_request jagger_satosa.1.niwh0x0v4r34 at totoro | if '?' in url: jagger_satosa.1.niwh0x0v4r34 at totoro | TypeError: argument of type 'NoneType' is not iterable jagger_satosa.1.niwh0x0v4r34 at totoro | jagger_satosa.1.niwh0x0v4r34 at totoro | The above exception was the direct cause of the following exception: jagger_satosa.1.niwh0x0v4r34 at totoro | jagger_satosa.1.niwh0x0v4r34 at totoro | Traceback (most recent call last): jagger_satosa.1.niwh0x0v4r34 at totoro | File "/src/satosa/src/satosa/proxy_server.py", line 118, in __call__ jagger_satosa.1.niwh0x0v4r34 at totoro | resp = self.run(context) jagger_satosa.1.niwh0x0v4r34 at totoro | File "/src/satosa/src/satosa/base.py", line 258, in run jagger_satosa.1.niwh0x0v4r34 at totoro | raise SATOSAUnknownError("Unknown error") from err jagger_satosa.1.niwh0x0v4r34 at totoro | satosa.exception.SATOSAUnknownError: Unknown error ############################