Website totally not viewable, backend or frontend

Hey Guys,

Hopefully you can shed a little light on this before i get to start trying whole bunch of things.

The site has been fine, yesterday shut down the admin and all was fine, today went back tot the site and all i get is the spinning loader, and the backend cannot access but some message about cookies being turned on.

Added debug to the config file so you can see the output, but the messages are all related to backendstyles not defined, also some error that the headers have been sent but not read/writabe.

Also errors pointing to wp-includes/pluggable.php

From the FTP we have disabled all the plugins which is only woocommerce anyway, this made no difference.

Different browsers will give you different results, but all give the errors. Some allow you to scroll the pages with issues on the images.

I have sent you the link to the site in the private section,

Look forward to you reply and some quick resolve.

Thanks