I use Facebook comments on every page on my website, using their Comments plugin.
Recently, I noticed that the comments on every web page have stopped showing up, giving the following error in the console:
Refused to display [url] in a frame because it set 'X-Frame-Options' to 'deny'.
Full error:
Refused to display 'https://www.facebook.com/plugins/feedback.php?app_id&channel=https%3A%2F%2Fstaticxx.facebook.com%2Fconnect%2Fxd_arbiter.php%3Fversion%3D44%23cb%3Df2f5722dfd41%26domain%3Dtheinternet.io%26origin%3Dhttps%253A%252F%252Ftheinternet.io%252Ffb2882a8d21d58%26relation%3Dparent.parent&container_width=1904&height=100&href=https%3A%2F%2Ftheinternet.io%2Ftest-page.html&locale=en_US&numposts=5&sdk=joey&version=v3.3&width=550' in a frame because it set 'X-Frame-Options' to 'deny'.
Further, when I put in any url from my website into the Comments Plugin Code Generator from Facebook, an example of the comments box won't even show.
I've tried setting links to target="_top", as suggested in this post, but that did not change anything.
If you want to recreate the problem, here is a test page.
After checking the Sharing Debugger, it turns out my website is blocked for not meeting the Community Standards, receiving this error: "We can't review this website because the content doesn't meet our Community Standards. If you think this is a mistake, please let us know."