The device display uses WebRTC (Web Real-Time Communication) to render the virtual device display.
If the virtual device display is black, WebRTC connections are blocked.
1. Add-ons and extensions
Some add-ons or extensions block WebRTC communications.
Disable add-ons and extensions when using Genymotion SaaS if WebRTC communications are blocked by these add-ons or extensions.
2. Google Chrome/Chromium
There are known issues with Google Chrome/Chromium versions 89 and earlier regarding WebRTC communications.
If you are using Google Chrome, use Google Chrome/Chromium version 92 or above.