The URL being reported above is no longer used by JFBConnect. The feature for facebookChannel was removed by Facebook and so we removed the feature in our 6.0 release.
Google will see a 404 error for a while and eventually will just ignore the page. There is nothing in JFBConnect that points to that page anymore, so it's not going to stay forever. Of course you can create an .htaccess rule or similar to redirect that URL somewhere else if you'd like.
I hope that helps,
Alex
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