Getting basic PLIGG to work



My brand new PLIGG site is installed and I thought I would give it a go and try to modify it.
My first order of business is to create an account apart from the admin. Which I did.
Then I figured I would create a group. I assume a group is akin to a page for my purposes.
But creating my test group failed. I recorded my attempt so you can see what I actually did.

The error is:
Wrong Referrer ‘

The recording of what I did is:
Pligg Error 02 - YouTube

and here:

I wish they had some documentation. There is a “Tips” section on the pligg forum but nothing seems to point to the issue I am having.