Dev Days Tutorials : Can't log into Apex and Can't connect to Ora server

Hello All,
I downloaded the pre-built Oracle VM from Developer Days. The setup works fine. I am now trying to follow hands on labs. There are a couple of things I am stuck at (at the very beginning).
1. The link to http://localhost:8080/apex does not work. Browser failes to connect. I suppose this is a required step continue labs.
2. In SQL Developer (I am familiar with this app), I can't create a connection. I tried using SYSDBA, SYSOPER as user names with oracle as password, but can't go anywhere. One of the items in lab is to unlock the account 'hr'. SQL Developer and sqlplus won't let me log in.
One of the things I noticed when the VM boots is a message saying Oracle Listener is not set up and (probably) won't be starting.
I would appreciate if anyone would help with items above. Thanks in Advance.
Ravi

I think the link is actually http://localhost:8888/apex well this one works for me anyway, using the Developer Day "Database App Development" downloadable VM

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