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? As a teacher, how do I use the VIP login in the Klett Augmented App? Can I take part in the online seminar using a mobile device (tablet, smartphone)? Can I return my book code for a digital edition (BlinkLearning LMS)? Why is the menu control bar not visible in the Klett Spachen App?