Error "access_denied: Cannot read property 'endsWith' of undefined" when trying to Debug the Keycloak Application

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Last Updated: Sep 24, 2024

Overview

When trying to Debug the Keycloak Application SAML 2.0 Addon, the following error is received:

access_denied: Cannot read property ‘endsWith’ of undefined

Steps to reproduce the error:

  1. Click on Keycloak Auth0 Application.
  2. Click on Addons.
  3. Click on SAML 2.0 (not disable, click on the text).
  4. Scroll down and click Debug .
  5. New page opens with error.

This article details why this error appears and how to get past it.

Applies To

  • Keycloak Application
  • SAML 2.0 Addon
  • Debug

Cause

The error is coming from the Rule “Adding Roles to Access Token and ID Token”.

  • user.issuer.endsWith(endsWith)

The issuer is undefined.

Solution

There is a misconfiguration in the rule. Disable the rule or add a null check to the line where user.issuer.endsWith(endsWith) is.