Facebook like – link back from FB activities does not work

Hallo,

I just signed up for this forum, and pls excuse if I am posting something that is obvious to solve, or not for this part of the forum.

I am trying different social plugins with a FB like function (now 4 different plugins). When the activity (my “like” click in WP) shows in the activity feed/box in FB, that link is not working, and gives a

“Forbidden – You don’t have permission to access /blog/2012/08/fyra-rad-for-val-av-kosttillskott-for-barn/ on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.”

the link address in the FB activity is:
https://www.ebooksandhealth.com/blog/2012/08/fyra-rad-for-val-av-kosttillskott-for-barn/?fb_action_ids=458709087485880&fb_action_types=og.likes&fb_source=timeline_og&action_object_map=%7B%22458709087485880%22%3A225516677575471%7D&action_type_map=%7B%22458709087485880%22%3A%22og.likes%22%7D&action_ref_map=%5B%5D

https://www.ebooksandhealth.com/blog/
https://www.facebook.com/lollovestlund

I asked the host, and they say it is not in their hands. Since avery plugin I try gives the same error, I wonder if this is a WP problem, or a FB problem?

In the same activity feed, if I click on comments, and from there click the link back to WP in that comments box, the link works fine. And if I share a post for example, that link, showing up in status, with a link back to WP, works fine.

Also, on ebooksandhealt.com, I have a Prestashop site, and from there this function and links in FB activities works fine.

If someone reads this long question, I appreciate any help!

Thanks