When configuring User Mapping for an OpenID Connect (OIDC) application, a warning appears because the Identity Provider (IdP) does not provide the required information. The following error message is displayed:

Error transforming template due to missing keys (1) from IdP context

• OpenID Connect (OIDC)
• User Mapping

The error occurs because an attribute defined in the User Mapping configuration is not present in the ID token sent by the external IdP.

To resolve this error, identify and remove the problematic attribute from the User Mapping configuration. Use one of the following methods to find the attribute.

Method 1: Isolate the Attribute

1. Go to the User Mapping configuration for the application.
2. Remove one attribute from the mapping.
3. Test the connection.
4. Repeat the process of removing attributes one at a time until the error no longer occurs. The last attribute removed is the one causing the error.

Method 2: Decode the ID Token

1. Intercept the ID token sent by the IdP.
2. Use the JWT.IO Debugger to decode the token.
3. Review the decoded token to see the attributes the IdP is sending.
4. Compare the attributes in the token with the User Mapping configuration to identify the missing element.