The error message indicates that there is a disparity between the extension and VirtualBox versions. This can be because either of them is outdated or the extension ...

It is the first thing you need to fix the issue as stated above. For that, you need to run the virtual machine showing the error and go to the Devices > Install Guest ...

Stephen Glasskeys Finally if you are still unable to start the VM, use the Machine menu’s Show Log feature to view a detailed log of the machine boot process. Another resource that may be of help is ...