How To Fix /IWNGW/CM_HUB155 - Exception during OAuth Token fetch. Please check configuration

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWNGW/CM_HUB -

• Message number: 155

• Message text: Exception during OAuth Token fetch. Please check configuration

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWNGW/CM_HUB155 - Exception during OAuth Token fetch. Please check configuration ?

  The SAP error message /IWNGW/CM_HUB155 Exception during OAuth Token fetch. Please check configuration typically indicates an issue with the OAuth configuration in your SAP system, particularly when trying to fetch an OAuth token from an external identity provider or service. Here are some common causes, solutions, and related information for this error:
  Causes:
  
  Incorrect OAuth Configuration: The OAuth client configuration (client ID, client secret, redirect URI, etc.) may be incorrect or incomplete.
  Network Issues: There may be network connectivity issues preventing the SAP system from reaching the OAuth provider.
  Expired Credentials: The client credentials (client ID or secret) may have expired or been revoked.
  Scope Issues: The requested scopes may not be valid or may not be granted to the client.
  Authorization Server Issues: The OAuth provider may be down or experiencing issues.
  SSL/TLS Issues: There may be issues with SSL/TLS certificates if the OAuth provider uses HTTPS.
  
  Solutions:
  
  
  Check Configuration:
  
  Verify the OAuth client configuration in the SAP system. Ensure that the client ID, client secret, and redirect URI are correctly set up.
  Check the OAuth scopes being requested and ensure they are valid and granted to the client.
  
  
  
  Test Connectivity:
  
  Use tools like curl or Postman to test the connectivity to the OAuth provider and ensure that the token endpoint is reachable from the SAP system.
  
  
  
  Review Logs:
  
  Check the SAP application logs (transaction SLG1) for more detailed error messages that can provide additional context about the failure.
  
  
  
  Update Credentials:
  
  If the client credentials have expired or been revoked, update them with new values from the OAuth provider.
  
  
  
  Check OAuth Provider Status:
  
  Ensure that the OAuth provider is operational and not experiencing downtime or issues.
  
  
  
  SSL/TLS Configuration:
  
  If using HTTPS, ensure that the SSL/TLS certificates are correctly configured and trusted by the SAP system.
  
  
  
  Consult Documentation:
  
  Refer to the official SAP documentation for OAuth configuration and troubleshooting specific to your version of SAP.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address known issues or provide additional guidance on OAuth configuration.
  Community Forums: Engage with the SAP Community or other forums where similar issues may have been discussed.
  OAuth Provider Documentation: Review the documentation for the specific OAuth provider you are using to ensure compliance with their requirements.
  
  By following these steps, you should be able to identify and resolve the issue causing the /IWNGW/CM_HUB155 error in your SAP system.