I believe, the new changes in notification permissions, and construction styles breaks the notification functionality of this framework. I had the notifications working before update to Xcode 13, then after, they broke. I am not smart enough to prescribe a fix, but have suspicions. I think perhaps because the backend ORSSerial.m files are Objective-c and build notifications using Obj-C parlance they are not valid for Xcode 13 standards? not sure. I will keep looking into fixes...