For anyone experiencing the black screen issue, here's a YouTube video by: 3D CHARACTER MAKER that shows a fix.
https://www.youtube.com/watch?v=jk_LnApdt3s
I hope this helps!
!!! Buildbox 3 beta on windows 10 is not displaying the workspace
this method works only with NVIDIA GPU drivers
if its not works please notify me in the comments below 🙏