used facebook plugin and site vanished

Hi,
By “site vanished” you mean there is blank page instead of content, right?
If so, it means that there is an error in the php files and the debugger is disabled, deactivating the plugin should fix it, if you can’t access wp-admin then you can deactivate the plugin by renaming the plugin folder using ftp (in the tutorial it says to delete the folder, renaming it will work also!). If by “site vanished” you want to say that the database is empty or there are no more php files in the server file system let us know.
Regards

From the incomplete info provided by you we can only make assumptions and presumptions that need not be correct. Posting a URL of your site will help us help you.

The pages is blank. I accessed the dashboard through the login URL and disabled all plugins in the first instance. I backed up the database and installed the latest version of WordPress. Still nothing. Here’s a link: https://eliashcroft.com/ – a very nice blank page which eternally tries to load.

I’ve thought of reinstalling everything but hope someone has an idea for me before I take that somewhat drastic measure.

Thanks for helping.

From what I see the page gets stuck while rendering the header, so the error is most probably in header.php. If you have a backup you can overwrite only this file, if you want to manually debug it then you can fallow the html text from the file and the error must be somewhere after :

<!--[if lt IE 9]>
	<script src="https://html5shim.googlecode.com/svn/trunk/html5.js"></script>
<![endif]-->

but if I were you I’ll go with overwriting the file.
Regards

A big THANK YOU Jnhghy! I went through the header and found a dodgy looking link (to nowhere?) I removed the line of code and the site loaded!

This job came my way because the actual designer of the site/template is holidaying and out of touch. It will be interesting to find out what the deal is with that line of code.

Thanks to everyone who gave me their time.