Cannot read property endsWith of undefined

Problem statement

When I try to Debug the Keycloak Application SAML 2.0 Addon, I get the following error:

access_denied: Cannot read property 'endsWith' of undefined

Steps to reproduce

  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 an error.


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


The issuer is undefined.


This is a misconfiguration in the rule. Disable the rule or add a null check to that line.