I get the following error in iTunes connect when I try to submit my build for review:
New apps and app updates must be built with the public (GM) versions of Xcode 6 or later, macOS, and iOS SDK. Don't submit apps built with beta software including beta macOS builds.
Invalid sdk value. The value provided for the sdk portion of LC_VERSION_MIN_IPHONEOS in [App Name] is 11.2 which is greater than the maximum allowed value of 11.1.
Someone has not updated the maximum allowed version to 11.2 😟