I can’t get my OP to work – Server Maker - Multiplayer for Minecraft PE Review

I can’t get my OPs to work. I’ve tried rebooting and resetting, but when I try and reset it, it keeps loading forever then crashes. My brother uses this app on his iPhone 4 and he says it works just fine. I have it on the iPhone 6s and with the newest software update and it still doesn’t work.
Review by MMisshka on Server Maker - Multiplayer for Minecraft PE.