Only on iPhone it won’t work?.. – Happy Hop: Kawaii Jump Review

I’ve been trying to get into the game for weeks now and every time I click on it, it would show a black screen then kick me out, I’ve been reading recent reviews and seeing no one with the issues, I don’t want to delete the game and redownload because I will lose my progress, please update the game and fix whatever this is, please. Ik it’s not my storage nor Wi-Fi.
Review by Itgetsmeup on Happy Hop: Kawaii Jump.