I am running Viber on the Android emulator Bluestacks 4 on Windows 7 Pro on my laptop. I do not have a smartphone. Until today I could use Viber to chat with my contacts using text and also to chat with them using audio and video (in the latter case, using my webcam). Earlier today I accidentally uninstalled Viber. I then reinstalled it, and since then I have been able only to chat using text. When I try to call them, they cannot accept the call. When they try to call me I can see that they are calling but when I click on the green telephone icon nothing happens.
How can I restore the audiochatting and videochatting functionality?