Kernel driver not installed (rc=-1908)

The VirtualBox Linux kernel driver (vboxdrv) is probably not loaded.You may not have kernel driver installed for kernel that is runnig, if so you may do as root: 'yum install kmod-VirtualBox-$(uname -r) kmod-VirtualBox'

On *not* stable versions of Fedora you need use akmods (because we don't have pre-built kmods) or for custom kernels, you may do instead as root: 'yum install akmod-VirtualBox kernel-devel-$(uname -r); akmods'If you installed VirtualBox packages and don't had reboot the system, you may need load the kernel driver, doing as root: 'systemctl restart systemd-modules-load.service'