I am having the same issues… AND suddenly while I was setting things up.
everything was working just fine, and then my last refresh I get….
“Page not found
The page you are looking for might have been removed,
had its name changed, or is temporarily unavailable.
Please try the following:
If you typed the page address in the Address bar, make sure that it is spelled correctly.
– Click the Back button in your browser to try another link.
– Use a search engine like Google to look for information on the Internet.
HTTP 404 – File not found”
My urls are secure. I have the latest version of the wordpress and the plug in.
here is my fb page: https://www.facebook.com/whitegazelle?sk=app_298256893535668
but the page is there….
https://whitegazelle.com/fbtab/white-gazelle-welcome/
not a techy… is it best i just use an app from fb? I would prefer managing content from wordpress.