Have you completed step 12 and 13? I added 13 a bit later, maybe in your version it wasn't there yet and you didn't press the Save button. I heard that was a common error before.
Another common problem is that the network node is overwhelmed that you added (e.g. node2.liquideos.com:8888). You can try some of the other ones in the list at the bottom of the post in the Troubleshooting section.