I started a new project today, did the design in Onshape, and then tried to bring up a KM tab. And nothing happened.
So I went back to a previous project, which already had an associated KM tab, and tried opening that in Onshape. I got the following screen message. When I dismissed the message, indeed KM didn’t function, and simply hung with “Loading…” written on the screen.
I believe I’ve done a full reset of my Chrome settings (while debugging a different issue) since last using KM, so it’s possible that may be a clue.