Parametric Truss Series

Really liking this tutorial video series….but I can’t get through the end of the third one. When I try to check if everything is working on the curves at 7:55, I get the spinning wheel of death. After waiting a while I’m maybe able to move one slider but the triangles don’t look like they’re molding to the curves and then the application just stops responding. Have tried restarting the app and my computer a few times.