After a few tries I finally learnt to get it working!
Follow these Steps and it should work 100%!!
1. Download normally the Cytriik Launcher and extract it to your Desktop.
2. Dont start the Launcher! Go in to your account and buy all you want to change!
3. Now close S4 League and return to the Launcher. Do a right-click and open it as admin!
4. Now it should say "updating" and after that "waiting".
5. When it says "waiting" go open your S4 League.exe or patcher_S4
6. Log in and go in to your inventory. Now for all, which say "It doesn't appear anything if I click F11!" For those I simply can say: Go download the Packages, which are on the first page!
7. Push F11 in your inventory an check all items you want as fp and of course the sets and item effects!
8. Go back to serverselection and go back in to your server.
9. Now go back to the serverselection again and press ready this time!
10. The messages with the Freeze way should pop up. Just try one of them it doesn't matter if you press Yes or No.
11. Press ok and move your mouse on your server! Don't click just wait.
12. Now the messages It surely worked should come. And Guys if it doesn't change anything then try the steps 7-12 again.
If I helped you out I would be pleased about a thanks