Hello Theo,

I am really sorry for the delay of this reply as it is a weekend for us here.
Are you using latest version of Easyblog? If no, try update to latest version of Easyblog and see the error is it still existing when you publishing the blog post?
If yes, is it possible provide us with your Joomla backend, Facebook access and FTP access so we can help you investigate on this issues? Please advise.