Why is there no data download/upload between the Klett Sprachen App and the Cloud? 25 June 2021 12:47 Updated Check your internet connection. You must have a stable connection to save or download data. Related articles Why is the Klett Sprachen App not working? Why can't I download/see the content in the Klett Sprachen App? Why is the menu control bar not visible in the Klett Spachen App? Are the exercises in the Klett Sprachen App interactive? Can I save the completed exercises in the Klett Sprachen App to hand them out for check?