Hi Paul Leertouwer,
Thank you for reaching out to us on Microsoft Q&A forum.
For each module, we provide exercise units tailored to the topic. These exercise units are complemented by labs, where you can apply what you've learned in a practical setting.
In the lab section, you'll find detailed instructions guiding you through the tasks. Everything is clearly outlined, including where to download necessary files and what actions to perform to complete the module successfully.
Learn path unit: Lab - Model data in Power BI Desktop, Part 1 - Training | Microsoft Learn
Step 1: Launch the lab as per below screenshot.
Step 2: Copy the password from right side as highlighted.
Step 3: Click the downloaded lab files to D-drive as highlighted in below screenshot.
Please don't hesitate to reach out to us if you have any further queries with screenshots of the error (after hiding all PII).
I hope the information provided has been helpful to you! If so, please accept the answer by clicking the "Upvote and Accept Answer" on the post. We value your feedback, and it will help to assist others who might have a similar query.
Thank you.