this is most likely a vm memory issue. how much ram is allocated to the vm? the pega jvm may be choking, so while the os has enough ram to start w/ a successful network config (which is why you can ping the ip address), the pega jvm may be choking which is why you cannot get to the pega login screen.
the good news is, a cloud exercise system will be available in the next few days. everyone enrolled in this course will be notified individually.