Hello, I had the same problem and upgraded to have enough ram (8GB to 16GB, the max for my 2012 macbook pro) for both osx host and Windows 10 guest in Virtualbox, but no change, because the problem is elsewhere entirely! I just unabled 3d acceleration in the Virtualbox settings and the launcher worked! So it’s a bug in Virtualbox…havent’t tested the engine in it yet, don’t know if it will be ok without the 3d acceleration…