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 allango licence key? What steps do I have to take or observe before the online seminar? Why do I hear an echo during the online seminar? How do I activate my digital editions in the Klett Sprachen App?