SAML Logout Error - "missing client.addons.samlp.logout.callback"

Problem statement

Performing SAML logout results in the error missing client.addons.samlp.logout.callback


This error occurs when the logout url is not added in the Application’s Addon.
To resolve this issue, add the logout url in the Application’s Addon as per the screenshot below:
(Dashboard > Applications > select your application > click on Addons > SAML > settings)