Can not boot after unexpected shutdown

Hi there,
I’ve installed RancherOS v1.0.1 in VirtualBox with my mac, used for running few services, it works fine so far. But the last time I restarted mac without the vm power off, after that I saw the VirtualBox indicate that vm unexpected shutdown.
I start the vm and get the vm stuck as following picture shows:

And it now seems not respond for typing and other, how do i fix this problem?