Hello everyone,

I’m an apprentice at my company, and as mentioned above, one of our employees is no longer able to make calls via the browser(3CX). It rings, but as soon as they pick up, there’s no sound in either direction. While 3CX isn’t working, other audio sources and video chats are working fine.
I’ve already tried reinstalling VirtualBox and opening the necessary ports, but nothing has helped so far. The problem only occurs when VirtualBox is running and a VM is launched.

The employee is using Ubuntu 22.04.4 LTS and VirtualBox 6.1.50_Ubuntu r161033. The VM's are W10 and W11.

Has anyone had similar experiences and can offer any advice?

Best regards