How to resolve error in running vagrant up on macOS

I am using vagrant to setup a ubuntu virtual machine. I have installed virtualbox and vagrant. When I run "vagrant up" I run into following error :

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

Command: ["startvm", "268774c3-ac5e-4b96-b17e-99cc4c66b27f", "--type", "headless"]

Stderr: VBoxManage: error: The virtual machine 'profiles-rest-api_default_1536758322698_53584' has terminated unexpectedly during startup with exit code 1 (0x1)
VBoxManage: error: Details: code NS_ERROR_FAILURE (0x80004005), component MachineWrap, interface IMachine

After investigating a bit more I found that VMbox is not starting from GUI as well and giving the following error:

Failed to open a session for the virtual machine profiles-rest-api.

The virtual machine 'profiles-rest-api' has terminated unexpectedly during startup with exit code 1 (0x1).

Result Code: NS_ERROR_FAILURE (0x80004005)
Component: MachineWrap
Interface: IMachine {85cd948e-a71f-4289-281e-0ca7ad48cd89}

When I tried to install it with brew cask install virtualbox, I recieved the following error:

Error: Failure while executing; /usr/bin/sudo -E -- env LOGNAME=username USER=username USERNAME=username /usr/sbin/installer -pkg /usr/local/Caskroom/virtualbox/5.2.18,124319/VirtualBox.pkg -target / exited with 1

Are you using Mojave? There's a known issue with it.

Do the following:

1. Update VirtualBox to the latest version. I'm not sure of which one works, but 5.2.10 didn't work for me whilst 5.2.18 did.
2. Grant iTerm, Terminal or whatever you use to boot your box Full Disk and Accessibility access, as per this thread
3. Restart iTerm
4. vagrant up

Good luck!