@Un'kn0wn, you can try clearing your cache with CCleaner or any other tool. Another thing would be to try to run XZR APP in compability mode for Windows XP SP3.
@cнαяℓу ѕcαяƒαcє, did you try with any other champion? Also can you try with a smurf account?
@KornelkaxP, the tool is free! Just click on League of Legends Helper tool Lite
@nhok.games1, skinhack does not work with 3.11, just wait for your server to update.