Help with GroupManager plugin?

So I need to add a ranking system to my server before I make it go public. I want them to be able to go to minigames like skyblock or just regular survival. however, the permission nodes for these ranks are standing in the way. So I ask of you fellow people to help me with this one question: how do I use GroupManager for this task? I want to add multiple ranks, but when I added a bunch of perm nodes, I got an error.log file and it said that I was appearently blocked. (I had to create this new account just because it would not let me sign into facebook) However I could still start the server, edit configs, and do everything else normally. this was the problem I needed to fix, as every time I would delete it, it would pop right back up. idk what I did wrong, but I know I put the permission nodes in correctly.