Why is the picture / sound suddenly gone during the online seminar? 22 August 2024 09:41 Updated Close your internet browser and log in again. Related articles Why can't I play the audio files in the Klett Sprachen App? Where can I find the licence key for my product? What steps do I have to take or observe before the online seminar? How do I activate my digital editions in the Klett Sprachen App? How can I play the audios for my book in allango?