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Open ID connect (OIDC) Sign in fails with "java.lang.ClassCastException: com.ibm.bi.json.JsonArray cannot be cast to java.lang.String" in Cognos Analytics

Troubleshooting


Problem

User is not able to sign in Cognos Analytics

Symptom

Call to IdP failed to get identity. Status 400
AAA-AUT-0018 The authentication request failed. Please refer to the nested messages for the cause of the failure.
AAA-SYS-0001 An internal error occurred.
java.lang.ClassCastException: com.ibm.bi.json.JsonArray cannot be cast to java.lang.String

Document Location

Worldwide

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Document Information

Modified date:
14 January 2026

UID

ibm16263007