Installation failures on Iphone13, iOS 16.3.1 of latest Prey version 2.1.16 from App store

Hello support,
After I have created an account through browser on a Macbook Air for testing your service on a IPhone13 the attempts failed due to not being able to properly add the device.
On the iphone the app keeps on returning to the screen with Title YOUR SECURITY HUB after trying to sign in with the existing account.

On the MAC it shows that the sign ins did result in something: having too many devices registered which remain useless.

Could you please solve this buggy installation process?
Similar message is sent to your help address.