NextScripts

That was related to New Facebook Design transition.

Most of the issues associated with New Facebook Design were resolved in the API version 4.5.1. Connection with session, postings to Profiles, Pages and Groups as well as “Comments import” should be working now. Please go to the Help/Support page in the plugin and click “[Check for API Update]”.

Please see here for more info.
https://www.nextscripts.com/news/2020/09/facebook-issues-during-new-design-transition/

This issue has been fixed in the latest version 4.3.18.

It looks like Facebook is no longer accepting shortened links. We will check if something can be done about that.

Will be fixed in the next release.

Support area is actually over here: https://wordpress.org/support/plugin/social-networks-auto-poster-facebook-twitter-g/

It would be very helpful if you tell us what exactly is not working or what error message you are getting. There could be many different issues or errors, and we can’t help you without knowing which one you got.

Why SNAP submits https://www.website.com/?p=123456 to Facebook instead of proper URL like https://www.website.com/topic/somepage?

SNAP Does not submit anything other than URL.

Here how it works.
1. You publish the post.
2. SNAP tells Facebook – “hey, here is the new post and a URL of the new post this person wants to share to his Facebook page”.
3. Facebook comes to your new post/page and gets all info it needs from your OG tags.
4. Facebook adds a “Shared Post” block to new post using info from step 3.

OG tags MUST be on your site at the time Facebook comes to check it.

Please re-enter the activation key if you lost the Premium API. It should be working fine now.