Strange issue with a Fan Page - need help

Hello,

I have a page with 20 000 likes. I haven't posted for years. Now when I try to post, an error pop-up appears: "Not authenticated. You are not permitted to access this resource" and it won't allow me to post. However, when I attach a link to the post, it posts, but it doesn't show up in news feed. No fan can see the post, except if the fan enters in page. Same for photos. It's really frustrating

It's clear that this page is bugged. My idea was to create a similar page and merge them, therefore keep all fans and having a new page. I cannot, because Facebook only allows merging pages with fewer likes into a page with more likes. (Shitty Facebook!)

Is there any trick I can do to regain access to my page or a loophole that allows me to transfer fans into a new page ? Thanks you.

I think u may inform facebook that u r facing this issue
or try inform fb that ur page was hacked may be that works

If you haven't do any behaviour on your page for a long time, Facebook may think your page is abnormal. And the credibility of your page will be lower and lower, so there may be some features may be banned by Facebook. So may be you can contact with FB support, and also do some normal behaviour on your page, increase the activity of your page.

I have to see your fb fan page for once to check what is the problem with it .. or contact to facebook support . they can help you more better .