3703273 - Error when accessing or updating SAP Knowledge Provider -SAP Document Management Service Integration

• Unable to access any file or document from DMS
• Users can not attach or retrieve documents from S4 system (SDM integration with S/4)
• Error message observed: "An error occurred when uploading to SAP knowledge Provider" or 'System error when accessing Knowledge Provider'
• Below ICM Trace error is noticed:
  • ERROR => SSL handshake with sap-dms.authentication.xxxx.hana.ondemand.com:443 failed: SSSLERR_PEER_CERT_UNTRUSTED (-102)
  • Peer's X.509 certificate (chain) validation failed (missing trust?)##SapSSLSessionStartNB()
  • ERROR: The chain of certificates is incomplete or untrusted, missing certificate of CN=DigiCert G5 TLS 
  • PKI validation: FAILED: Validation of dependents - Issuer Certificate (ERROR: Issuer - No Certificates Found)

Note: This issue happens since the latest PKI change of BTP root certificate.

• Document Management, integration option

sap dms, document management system, unable to retrieve documents, integration, digicert tls rsa4096 root g5, digicert global root g3, abap certificate trust store, sap btp cloud foundry, public key infrastructure, ap21 region, document retrieval issue, sap note 3566727,  , KBA , BC-CP-CF-SDM-INT , Document Management, integration option , BC-CP-CF-ROUTING , Cloud Foundry Runtime Ingress Routing Stack , Problem