Ur getting the message because your account isn’t old enough. Wait a week it should be fine. Btw. There is a second cycle for NU Ladder tournament. Sign up, but make sure to change your username on PS! to something like this : NULT2O OKBUTGG. https://www.smogon.com/forums/threads/neverused-ladder-tour-ix-cycle-2.3746944/post-10186796