I can send the project files to you privately, that wouldn't be a problem. However, it requires @realthunder's Assembly3 WB.
The document is very outdated, but still helpful on this topic: https://www.dropbox.com/s/k40drc9rlkflr ... n.pdf?dl=0
I prefer reporting issues at https://github.com/realthunder/FreeCAD_assembly3/issues. It's more appropriate place as this thread is a "chat room" and github is a real issue tracker.