Custom Skin Crash

After I pick a custom skin, the choose model type screen is blank. If I click on one of the blank boxes, the game crashes, and it keeps crashing until I re-install the game. Once I re-install the game, the whole process starts over again. I can to manually change the skin in options.txt by changing one of the recent skins to “custom” and it fixes it, but if I try and change it using the game again, it starts crashing. I have tried using many different skins and file types (jpegs/pngs). It only happens on my iPhone 6, even if I use the same exact skin on another device.