Hello @petermantos
This usually happens if you have entered the wrong details when you created the App in Facebook. Or have you changed a URL’s of an existing App?
Can you please recheck the settings of your APP in this page?
https://developers.facebook.com/apps
Choose the Facebook App for you are getting error while Registering
Then go to “PRODUCTS” section in that section choose Facebook Login , inside that section choose “Setting”, after choosing “Client OAuth Settings” panel will appear in that there is “Valid OAuth redirect URIs” textbox in that just enter your website URL.
e.g if your website URL is “https://yoursite.com/” then while entering in “Valid OAuth redirect URIs” textbox enter “https ://yoursite.com/wp-admin/admin.php?page=facebook-auto-publish-settings&auth=1 ” and click on Save Changes.(As mentioned in the plugin’s settings page as Note.)
However, as per new Facebook platform product changes and policy updates
Apps in public mode no longer allow their admins, developers, or testers to access permissions or features that normally require app review. This affects all apps built after May 1st, 2018, immediately. Apps built before then will not be affected until August 1st, 2018.
If you switch the app from live to development mode ,then it won’t show any error and also posts will be auto published to Facebook,but the posts won’t be visible to others since the app is in development mode.These post will only appear when you make the app live.
Your app need to go through the review process for the scopes publish_pages,manage_pages and user_photos to work with the existing plugin code.
We did submitted several apps to Facebook for review . If Facebook approves them, we will create a guide and update our instructions.
Since submitting app for review is a complicated and time consuming task, we are working on alternative method.And will update the plugin as soon as possible.
Thank you for the feedback and support
