15.7.6 iOS says there’s an “error and cant update please remind later” I have an iPhone 7

Hey I appreciate your kindness to TRY to help but you obviously didn’t read what I wrote but I’m trying to update which is the issue because it won’t work and keeps giving an “error” message but you then think telling me to update my iPhone 6 smh also I wrote that I have an iPhone 7 so please read before you post anything ty and have a nice day