Cannot locate entity

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Problem reference: 18101602-LWUNG2UC

Atacama platform activity:
LevelCategoryMessage
INFOcore >>>18101602-LWUNG2UC Invoking flow: authentication_response
WARNcore Data-source 'Apache:request' failed to return any data for parameter 'ldapURL' with match: user
WARNcore Data-source 'Apache:request' failed to return any data for parameter 'ldapURL' with match: user
ERRORsaml Unable to locate issuer in metadata: https://isiknowledge-com.proxy.worc.ac.uk
WARNcore Action failed for provider 'SAML:receiveAuthNRequest' in 'authentication_response' flow. Returned status was: NoEntity
WARNcore Data-source 'Apache:request' failed to return any data for parameter 'OA_USER' with match: user
WARNsaml No available response
WARNsaml No available assertion consumer service URL
WARNcore Data-source 'Apache:request' failed to return any data for parameter 'prepend' with match: user
INFOcore <<<18101602-LWUNG2UC End flow: authentication_response