(edit) I totally forgot The first error I actually get is when trying to install X-Pack, where I get the error that X-Pack is already installed!
According to Lab 1, available on the package at https://training.elastic.co/user/digital_content/82/download, I should execute, by item 8,
.\x-pack/setup-passwords interactive, but I only get a complaint that setup-passwords.bat is deprecated.
And then, when I try to run
.\elasticsearch-setup-passwords.bat interactive I get an error saying that X-Pack Security is not available.
The Lab says it needs version 6.x or greater, and the current version available for download is 6.4.2 - seems to me like this course is in dire need of revision. Following the steps there, I have no idea how I should activate X-Pack Security for running this course.