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 What steps do I have to take or observe before the online seminar? Why do I hear an echo during the online seminar? What are the technical requirements for participating in an online seminar? Where can I find the allango licence key? Why can't I hear anything even though I’m logged into the online seminar?