Hi,
I know this is an old thread, but I just recently had the redirect loop problem similar to others here, yet could find no working solutions.
Finally, I found that my Facebook App was still set to sandbox mode and once I disabled sandbox mode, the Nextend Facebook Connect plugin worked as desired.
It’s not a problem on Nextend’s side, but it probably should be in the instructions for the plugin setup. Hopefully, this solution will work for anyone who still has this problem.
