degarb wrote: ↑Thu Apr 22, 2021 11:47 pm
“Invalid selection: There are no attachment modes that fit selected objects. Select something else. “
If you select something prior to opening a sketch, FreeCAD figures you want to attach the sketch to it somehow. If it makes no sense to attach to what you have selected, it will give the error.
If you just do what you said: start a document, go to Part Design, create a body, create a sketch, then you'll get a dialog asking what plane you want to sketch on. If that doesn't happen, you're installation is seriously screwed up.