I tried, and I have almost the same problem than @disagreeablefusrodah, but for me, it's half working:
If I place only a Start point and an End point, without any waypoint between them, it's working. But as soon as I place more than 2 points, NPCs are ignoring the path, and even if I manually ask them to follow the path, they are ignoring it.
And PS: your Discord link is dead