Unable to get access code – error shows up

When trying to click on Get Access Token button from the WC Lookbooks main page, we get this error:
URL Blocked: This redirect failed because the redirect URI is not whitelisted in the app’s Client OAuth Settings. Make Sure client and Web OAuth Login are on and add all your app domains as Valid OAuth Redirect URIs.

When we try to click on the Get Access Token button from WC Lookbooks > Settings > Instagram, after clicking ‘continue as our account’ in the ‘YOou’ve previously linked Products Carousel 13092021 to Facebook, Would you like to continue with your previous settings? screen, it redirects us to the settings page.

We are hence unable to get the plugin working. Please advise.