IamNotShift5_0

Hello, the first day I downloaded apps, they worked just fine and my friends and I were having a good time but the next few days, when we tried to open the apps, it would show a black screen and instantly crash. I tried reinstalling the app by deleting it and it said that they could not verify the apps integrity. I did some research on this and found nothing that would solve the problem. I also tried to go to device management in settings to try and allow the app that was being installed, but it wasn’t there, only the iOSGods web clip. So I have also tried logging out and back in again, didn’t work, reinstalling the web clip, didn’t work. Nothing is working and if you know what to do and how to fix it, that would be greatly appreciated. Thanks