当我在ubuntu18.04中使用“ vagrant up --no-parallel”时，出现了关于virtualbox的错误

Question

当我在ubuntu18.04中使用“ vagrant up --no-parallel”来启动docker时，出现了关于virtualbox的错误

There was an error while executing `VBoxManage`, a CLI used by Vagrant
for controlling VirtualBox. The command and stderr is shown below.

Command: ["startvm", "2f658edc-0c95-43aa-a3d4-d9049b4578fa", "--type", "headless"]

Stderr: VBoxManage: error: VT-x is not available (VERR_VMX_NO_VMX)
VBoxManage: error: Details: code NS_ERROR_FAILURE (0x80004005), component ConsoleWrap, interface IConsole