Hello! dregun1! I'm sorry that the course seems to have been quite inconvenient for you. This course was opened quite a long time ago, and as you mentioned, it consists of an older version of the SW stack. The updated latest version is also important, but if I may make an excuse...^^;;; The purpose of the course was not to learn specific SW functions, but to focus on experiencing the various stages of a big data platform through hands-on mini projects. As a result, there was so much content included that some parts seemed rather abstract and difficult. (Oh! By the way, I've confirmed that all the practical exercises work well. Please feel free to ask questions about any difficult parts during the process~) Although it's an insufficient course, please complete it to the end~ -BigD Dream