VirtualBox won’t run win10: Failed to open a session for the virtual machine w10. Result Code: NS_ERROR_FAILURE (0x80004005)

VirtualBox Version: 6.1.22 r144080 (Qt5.6.3) Host Operating System: MacOS BigSur I came across exactly same issue, where clicking on add to choose image was crashing the dialog. This issue persists in the latest version of Virtual Box for Mac. I could figure out couple of ways to avoid clicking on Add button to choose image. … Read more