I've created a vitual machine on VirtualBox for KaOS, but it fails to start the iso.
Here is the screenshot with the errors.
Any solution?

Not seen the screenshot (not downloading unknown .png files, use an image pastebin service for that), but it probably is an issue that virtualbox needs to be run with 3d to boot Plasma 6.
Virtualbox > Settings > Display > mark Enable 3D Acceleration

4 days later

Not seen the screenshot (not downloading unknown .png files

Strange, I've used WeTransfer and I can see the image.

Virtualbox > Settings > Display > mark Enable 3D Acceleration

Done. Same error.