After adding new assertion consumer endpoints or logout endpoints, the AD FS configuration must be updated to match.
To update Login and Logout Endpoints in AD FS:
Log on to the AD FS server, and start the AD FS management console.
In the left side menu, expand Trust Relationships and select Relying Party Trusts.
Select the application that corresponds to your SAML Session Provider installation, on the format urn:<SAML router FQDN>_<SAML router https port>. Right-click and select "Update from Federation Metadata."
On the Endpoints tab, verify the SAML Assertion Consumer Endpoints. Then select Update.