The best thing you can do is follow these courses all the way thru, there are time’s where there is a node that needs to be connected to something later on in which some tend to forget to mention until later on. If your still having issues then the absolute best thing to do is back track, even if it seems like a really bad idea, you had to have tweaked one or two settings without realizing it, I’ve done it many times without thinking only to find that tweaking that single setting or finding a work around for that setting fixes it. Good luck