Principal propagation - Microsoft Azure and SAP (BTP)

Hello. I recently discovered Martin Raepple's Blog

Principal propagation in a multi-cloud solution between Microsoft Azure and SAP Business Technology Platform (BTP), Part I: Building the foundation | SAP Blogs

I am trying to get this to work in a POC env, and eventually emulate for a production scenario. It is a really good blog.

To be brief, I am looking for others who have followed this blog and may or may not have run into the issue I am facing.

In steps 50-52, I am getting the following error in Postman.

{ "error": "unauthorized", "error_description": "Error determining metadata contracts"}I think it is because my SAML assertion is not quite right. Any insight on where to focus my troubleshooting attention will be appreciated.

Jeff