So, I'm trying to just use a simple premade from Subetahq, and it keeps saying invaild username and code combation. I'm just coping and pasting. Has anyone else had this problem ?

You need to follow all the steps. Maybe you have forgotten Step 4 on SubetaHQ which says to put in your username and a special code?

No, I put in the code and username.

Have you selected a profile? If not, do so. If yes, maybe try a different one?

I have tried with 5 diffrent profiles.