On some systems, the UI is a bit screwed up – you click on an icon, and you see the wrong information for the item. This may be your problem here, since the “run as user” business relates only to the Dockerfile step.
The solution from the course repo should tell you what needs to be done with each step. We’re aware of the UI issue, but it’s hard to reproduce consistently, so we’re still working on it.
It is possible to forgot to update the user in the Dockerfile and that check to fail due to this reason, but yes, the UI is not working properly for all the Challenges, it’s a bit difficult to see what are the steps that need to be done, because the clicks are working only sometimes, after you first click on other part of the schema, but not necessarily, anyway, in the end it worked if the solution implemented is fully correct,