Problem with setting up SAML to Wazuh

[pwd-rh]

I am trying to get SSO (SAML) working for Wazuh. I followed the instructions at https://maikroservice.com/identity-management-wazuh-and-authentik with the exception of choosing a different user name (one I had already created) and changing the setup so that
both SSO and userid/password login active to verify that nothing except the SSO was causing problems.

I am using docker for both Authentik and Wazuh but they are in different docker-compose files. I can log into Wazuh with
a user name and password without problems but when I try the SSO option I get

"Failed to get saml header: Authentication Exception :: {"path":"/_plugins/_security/authinfo","query":{},"statusCode":401,"response":"Authentication finally failed"}"

in the docker log for the wazuh indexer (the container that handles logins)

In the logs I see

wazuh.indexer-1    | [2024-10-09T17:37:08,598][ERROR][c.a.d.a.h.s.HTTPSamlAuthenticator] [wazuh.indexer] Error creating HTTPSamlAuthenticator. SAML authentication will not work
wazuh.indexer-1    | java.lang.IllegalArgumentException: Illegal base64 character 2b

Has anyone seen anything like this?