Seems the only way here would be to host the stuff on the FreeCAD page, which costs additional money and is a ton of work to maintain, which would drain from FreeCAD development. That is why I prefer not to use any external dependencies when ever possible. Someone out of reach is breaking something and you need to find the problem and work around. These are the “joys” of coding, when you sit on dependencies. I did not try it, so there is a chance someone fixed the issue recently without posting a note. However I do not see a fix in the RealThunder daily release notes, yet. So unless a V0.18.6 appears, you need the latest daily of V0.19, which might got the fix already. Visit the Tutorials and videos subforum for more links. The FreeCAD Basics Tutorial book is an essential guide for engineers and designers without any experience in computer-aided designing. Select the Part Primitives Create tube option from the menu. This time - of course - also the V0.19 got broken. This page presents a selection of video tutorials made by FreeCAD users and developers. There are several ways to invoke the command: Press the Part Tube button. It took Microsoft two days to break the new bugfix again, by performing random changes to GitHub. You can alter the name of the group by double clicking on it from the Tree View.
Then, after month the FreeCAD developers merged the addon manager from 0.19 to 0.18 and released a bugfix for V0.18.5. In the Tree View, right-click on the name of the document. The addon manager of the V0.18.5 was broken for a while as Microsoft changed GitHub, which is used as server. The tutorial is meant to teach the Additive and Subtractive tools June 22, 2020.