Thread 2: Fatal error: Invalid API Key ai.fritz.sam.Demo for APK ID ai.fritz.sam.Demo

I am getting the error in the title

during installing process I never get the app connecting to the backend

Fritz (5.3.1), FritzBase (5.3.1), FritzVisionHumanPoseModelFast (5.3.0) iPhone 8 on iOS 13.5.1, Xcode 11.5):**

I was not using the correct api key. I got it in the set up page