How to display a page feed from Facebook on my site

The simplest way is to configure the SCSocialWidget and configure it as Facebook -> Page Plugin. With that, you just need to add your Facebook Page URL and set a couple of parameters. That's Facebook's own Page viewer for websites. The issues with that are that it's pretty rigid and not very customizable. If it works for you, though, great!

The other option is our Social Streams feature. It's more complex to setup, but allows for full HTML and CSS customization over the output. You can see an example of that below in our Social Stream at the bottom of our page, which mixes our Twitter, Facebook and LinkedIn streams together. For details on setting that up, see our documentation below:
www.sourcecoast.com/jfbconnect/docs/posting/social-streams

I hope that helps,
Alex

What do you mean by "Start over". What did you do, or undo?

In general, the first error about the manage_pages permission is normal. It means that you need to authenticate with the Facebook user you are setting up the channel with on the front-end of the site again. That is necessary so that JFBConnect can request a few additional permissions from the user in order to access the Facebook Page and post on that user's behalf.

Let us know if you're still running into the second issue, and we'll help how we can to resolve that.

Thanks,
Alex