Login Mesh Tools Kit in Unity does not working

I am trying to get familiar with Microsoft Mesh from a creator perspective, so I activated Teams Premium for it trial period to try Mesh possibilities. But follow the described tutorial on Learn, fot both version Mesh Tool Package, I get the same issue:

I am using Windows 11 Pro and I downloaded the described unity version, using Unity Hubs.
May anyone help me with this issue.

I would like to know as well if there is a more fast communication Chanel, like a Discord or something similar. I am a web developer, I have knowledge in Unity, C#, game concepts, Blender 3D and I am very interested in create some knowledge in Mesh development to ignite my Startup.

Thank you all and wish you the best!