External users - Test Version

Hello everyone 😃

Little question about External users, referring to this article:

Distribute Power BI content to external guest users using Microsoft Entra B2B - Power BI | Microsoft Learn

We started inviting Guest Users to our PowerBI Tennant as well and I am having a problem here.
The users we are inviting are using PowerBi on their own, having a Pro License. They are given access to a Pro Workspace of ours, so there should be no issues. The access works, but when viewing the external report, they do get a message on screen, saying, they do have a Free Trial License. This does not happen, when accessing their own reports.

What is happening here?