Error "opensaml::saml2md::MetadataException" "Unable to locate metadata for identity provider" when accessing Windchill page when SSO is configured

• Error in web browser when accessing Windchill page when SSO is configured

Unknown or Unusable Identity Provider 
The identity provider supplying your login credentials is not authorized for use with this service or does not support the necessary capabilities.
To report this problem, please contact the site administrator at xxx. 
Please include the following error message in any email: 
Identity provider lookup failed at (http://xxx.xxx.com/Windchill/) 
EntityID: http://xxx.xxx.com/adfs/services/trust 
opensaml::saml2md::MetadataException: Unable to locate metadata for identity provider (http://xxx.xxx.com/adfs/services/trust)

• Error below is reported in shibd_warn.log :

ERROR OpenSAML.MetadataProvider.XML : error while loading resource (https://<SERVER_NAME>/FederationMetadata/2007-06/FederationMetadata.xml): XML error(s) during parsing, check log for specifics
WARN OpenSAML.MetadataProvider.XML : adjusted reload interval to 600 seconds
WARN OpenSAML.MetadataProvider.XML : trying backup file, exception loading remote resource: XML error(s) during parsing, check log for specifics
ERROR XMLTooling.ParserPool : error on line 1, column 2722, message: grammar not found for namespace 'http://docs.oasis-open.org/wsfed/federation/200706'
ERROR XMLTooling.ParserPool : error on line 1, column 2722, message: attribute 'ServiceDisplayName' is not declared for element 'RoleDescriptor'
ERROR XMLTooling.ParserPool : error on line 1, column 3921, message: no declaration found for element 'fed:ClaimTypesRequested'
ERROR XMLTooling.ParserPool : error on line 1, column 32355, message: no declaration found for element 'fed:TargetScopes'
ERROR XMLTooling.ParserPool : error on line 1, column 33466, message: no declaration found for element 'fed:ApplicationServiceEndpoint'
ERROR XMLTooling.ParserPool : error on line 1, column 33722, message: no declaration found for element 'fed:PassiveRequestorEndpoint'
ERROR XMLTooling.ParserPool : error on line 1, column 33912, message: element 'fed:ClaimTypesRequested' is not allowed for content model