Hi @codalpayalshah. Sorry to hear you encountered troubles when setting up our plugin.
Can you clarify at which point exactly you are on? It’s clear you’ve completed Step 1 successfully by saving your App ID and App Secret. That’s great!
You’ve been able to reach Step 2, where there is a blue “Login with Facebook” button, correct?
Clicking that button should redirect you to facebook.com where you’ll be presented with an dialog to grant your app with the proper permissions. If you’ve already done this once, then clicking that blue “Login with Facebook” button again will, yes, redirect you back to the WordPress admin page.
Have you ever made it to this stage of the setup flow? If not, you can try removing the permissions for your app at the following link and trying the blue “Login with Facebook” button again: https://www.facebook.com/settings/?tab=applications
After the “Login with Facebook” step, you should be presented with a list of all the Facebook pages that you manage. Could you provide more information about what you see (or don’t see) within the Wizard Setup screen at this step?