Newest Version of Netiq Advanced Authentication App on Android not working

Version 3.1.20 works, version 3.20 gives error message:
"Error adding the device An error occurred while executing the request. Please check the availability of the server or contact the server administrator"

In case of updating the app, the green bubble changes to red and no push notifications are appearing anymore

SR is opened case number 02447738

Regards

Arndt