I have recently bought an iPad Pro 12.9 for editing on the go, but photoshop just won't work. When I first open the app it lets me press the sign in button, but that's as far as it gets before closing. Then when I re open the app, it gives a loading icon and says fetching subscription details, then closes again. Then every time after that it closes instantly. I've uninstalled it a bunch of times and re installed, but the same sequence happens again. Any help would be greatly appreciated.