Failed to install the Extension Pack ~/Downloads/Oracle_VM_VirtualBox_Extension_Pack-6.0.8.vbox-extpack.
The installer failed with exit code 667: VBoxExtPackHelperApp: error: Failed to open the extension pack tarball: VERR_ACCESS_DENIED ('~/Downloads/Oracle_VM_VirtualBox_Extension_Pack-6.0.8.vbox-extpack')
rcExit=1.
Result Code: NS_ERROR_FAILURE (0x80004005)
Component: ExtPackManagerWrap
Interface: IExtPackManager {70401eef-c8e9-466b-9660-45cb3e9979e4}