The following URL schemes found in your app are not in the correct format: . URL schemes need to begin with an alphabetic character, and be comprised of alphanumeric characters, the period, the hyphen or the plus sign only. Please see RFC1738 for more detail.
Though you are not required to fix the following issues, we wanted to make you aware of them:
SDK Version Issue - This app was built with the iOS 11.1 SDK. Starting March 2019, all iOS apps submitted to the App Store must be built with the iOS 12.1 SDK or later, included in Xcode 10.1 or later.
The App Store Team