VM virtual box won't start.(ubuntu 18.04 (64)(dde)?

Question

linux

Unable to open session for Ubuntu VM.
The virtual machine 'Ubuntu' has terminated unexpectedly during startup with exit code 1 (0x1).
Error Code: NS_ERROR_FAILURE (0x80004005)
Component: MachineWrap
Interface: IMachine {5047460a-265d-4538-b23e-ddba5fb84976}