Host error after power off hard to a VM instance

Is there a guide for the description of each of the functionalities of the opennebula sunstone web components?
I ask why I deployed a basic VM to familiarize myself with the environment but at the time of restarting the VM I applied a Power off hard to then delete the iso image of the instantiated VM so that it boots directly from the hard disk and it disconnected me from the host then I verified and it was in an error state.