we are facing this issue, and trying to see if anybody else saw the same..   we have the key in the right locaiton, and we have tried encrypted and un-encrypted version, and still see the same problem. We have tested DER, des3 version of the key file and no progres..  Do we need stick to a certain format of the key..    [05/Apr/2019 16:37:03 -0400] entity       ERROR    Signature Error: None [05/Apr/2019 16:37:03 -0400] client_base  ERROR    XML parse error: None [05/Apr/2019 16:37:03 -0400] views        ERROR    SAML Identity Provider is not configured correctly: certificate key is missing! Traceback (most recent call last):   File "/opt/cloudera/parcels/CDH-5.15.1-1.cdh5.15.1.p0.4/lib/hue/build/env/lib/python2.7/site-packages/djangosaml2-0.16.4-py2.7.egg/djangosaml2/views.py", line 254, in assertion_consumer_service     response = client.parse_authn_request_response(xmlstr, BINDING_HTTP_POST, outstanding_queries)   File "/opt/cloudera/parcels/CDH-5.15.1-1.cdh5.15.1.p0.4/lib/hue/build/env/lib/python2.7/site-packages/pysaml2-4.4.0-py2.7.egg/saml2/client_base.py", line 597, in parse_authn_request_response     binding, **kwargs)   File "/opt/cloudera/parcels/CDH-5.15.1-1.cdh5.15.1.p0.4/lib/hue/build/env/lib/python2.7/site-packages/pysaml2-4.4.0-py2.7.egg/saml2/entity.py", line 1140, in _parse_response     response = response.loads(xmlstr, False, origxml=origxml)   File "/opt/cloudera/parcels/CDH-5.15.1-1.cdh5.15.1.p0.4/lib/hue/build/env/lib/python2.7/site-packages/pysaml2-4.4.0-py2.7.egg/saml2/response.py", line 512, in loads     self._loads(xmldata, decode, origxml)   File "/opt/cloudera/parcels/CDH-5.15.1-1.cdh5.15.1.p0.4/lib/hue/build/env/lib/python2.7/site-packages/pysaml2-4.4.0-py2.7.egg/saml2/response.py", line 337, in _loads     **args)   File "/opt/cloudera/parcels/CDH-5.15.1-1.cdh5.15.1.p0.4/lib/hue/build/env/lib/python2.7/site-packages/pysaml2-4.4.0-py2.7.egg/saml2/sigver.py", line 1840, in correctly_signed_response     class_name(response), origdoc)   File "/opt/cloudera/parcels/CDH-5.15.1-1.cdh5.15.1.p0.4/lib/hue/build/env/lib/python2.7/site-packages/pysaml2-4.4.0-py2.7.egg/saml2/sigver.py", line 1614, in _check_signature     raise MissingKey("%s" % issuer) MissingKey: None [05/Apr/2019 16:37:03 -0400] middleware   INFO     Processing exception: : Traceback (most recent call last):   File "/opt/cloudera/parcels/CDH-5.15.1-1.cdh5.15.1.p0.4/lib/hue/build/env/lib/python2.7/site-packages/Django-1.6.10-py2.7.egg/django/core/handlers/base.py", line 112, in get_response     response = wrapped_callback(request, *callback_args, **callback_kwargs)   File "/opt/cloudera/parcels/CDH-5.15.1-1.cdh5.15.1.p0.4/lib/hue/build/env/lib/python2.7/site-packages/Django-1.6.10-py2.7.egg/django/db/transaction.py", line 371, in inner     return func(*args, **kwargs)   File "/opt/cloudera/parcels/CDH-5.15.1-1.cdh5.15.1.p0.4/lib/hue/build/env/lib/python2.7/site-packages/Django-1.6.10-py2.7.egg/django/views/decorators/http.py", line 41, in inner     return func(request, *args, **kwargs)   File "/opt/cloudera/parcels/CDH-5.15.1-1.cdh5.15.1.p0.4/lib/hue/build/env/lib/python2.7/site-packages/Django-1.6.10-py2.7.egg/django/views/decorators/csrf.py", line 57, in wrapped_view     return view_func(*args, **kwargs)   File "/opt/cloudera/parcels/CDH-5.15.1-1.cdh5.15.1.p0.4/lib/hue/build/env/lib/python2.7/site-packages/djangosaml2-0.16.4-py2.7.egg/djangosaml2/views.py", line 272, in assertion_consumer_service     return fail_acs_response(request)   File "/opt/cloudera/parcels/CDH-5.15.1-1.cdh5.15.1.p0.4/lib/hue/build/env/lib/python2.7/site-packages/djangosaml2-0.16.4-py2.7.egg/djangosaml2/utils.py", line 85, in fail_acs_response     return failure_function(request, *args, **kwargs)   File "/opt/cloudera/parcels/CDH-5.15.1-1.cdh5.15.1.p0.4/lib/hue/build/env/lib/python2.7/site-packages/djangosaml2-0.16.4-py2.7.egg/djangosaml2/acs_failures.py", line 22, in exception_failure     raise exc_class PermissionDenied   [05/Apr/2019 16:37:03 -0400] access       WARNING  162.44.245.32 -anon- - "POST /saml2/acs/ HTTP/1.1" -- 403 access forbidden ... View more