i think u posted in the wrong section and also u need to be on 4.46 to play ghost. I had a similar problem just use 4.46 drex its the same as 4.21 and u can go on dex or cex
you have to update to 4.46 d-rex ... i had the same problem as you so just got to rebugs website and download the cfw and update it like any other cfw and you should be good to mod ghost