Home-dasboard (hasskit)

’ have installed the actual version of home-dashboard (hasskit). its a really nice addon for my iphone with a compact view of all my sensors, switches, lights and…
i even got some more info of some sensors(!). e.g. the battery level of the ikea rollo!
my main problem is;
its working only in my local network. i could manage to incloude my other (duckdns) connection. After login, nothing is connected. the log info is not helpfull for me:

Login attempt or request with invalid authentication from ( (Dart/2.10 (dart:io))

has any body an idea for troubleshooting or workaround to get access outside of my local network?
thanks, dieter’