What is wrong with this – Anime Amino Review

I am on Anime Amino, i always get messages that say “Unkown message” and it is a call chat. My Amino will not provide an update for me to install, so I have no access in the “new update”. I have an iPhone 6s if that has something to do with it. I have tried restarting my phone, and uninstalling and reinstalling this app, and nothing worked. There is no update for this amino, no matter how much i tried to find one. It always says to update my amino, but there is no update in my app store. Someone tell me why this is.
Review by DREEMURR! on Anime Amino.