I just set up a new NearForums site and had to do the Facebook Developers circuit to get the API key and secret (Jorge's note above helped, but I think the Facebook Developers page looks a little different these days). I had missed the step of checking off
how I wanted to integrate with Facebook, using a website, and then I added the new NearForums URL. Once I did that the login worked. And I am able to get to the admin dashboard.
For me the most confusing thing so far about NearForums is the security. I expected to use the installation login (database user and password) to be able to login my first time. I did not guess that using either the Twitter or Facebook authentication would
get me in as admin.
For a newbie like myself, it would be Ever So Helpful to have some short instructions show up after the installation completes successfully. I actually reinstalled twice thinking I was doing something wrong with SQL db account info and that was why I could
Also, I am naive about what Facebook does once the authentication is made. Does the login choice they display (Public, etc) mean that the forum data will start displaying at my Facebook page?