Ambari Service Unavailable

Hi. I’m pretty new to this technology.
I installed the VirtualBox VM and started it up. I was able to access the main URL. (http://127.0.0.1:8888/) But when I try the Ambari URL (http://127.0.0.1:8080/) I am told the “Service is unavailable”.

I ran ambari-server start and confirmed that the service is started. Any help would be appreciated.