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 can't I download/see the content in the Klett Sprachen App? Where can I find the allango licence key? How can I purchase a digital edition for the Klett Sprachen App? What are access codes and where do I enter them? Are the exercises in the Klett Sprachen App interactive?