Vagrant was unable to mount VirtualBox shared folders
问题 Current setup: Virtualbox 5.1.20 with Vagrant 1.9.3 Previous working setup: Virtualbox 5.1.18 with Vagrant 1.9.3 I installed the latest version of Virtualbox and tried to start my VM. The folder mounting has stopped working. The same folder mounting works fine in Virtualbox 5.1.18 . I get the following error message: Vagrant was unable to mount VirtualBox shared folders. This is usually because the filesystem "vboxsf" is not available. This filesystem is made available via the VirtualBox