tsagita

define('WP_SITEURL','https://deannecraig.pn-onepage.co.nz/');
define('WP_HOME',' https://deannecraig.pn-onepage.co.nz/');

in wp-config.php

how about :

define('WP_SITEURL','your site');
define('WP_HOME','your site');

in wp-config.php ?

change permission folder to 755 or 777 on wp-content via ssh or ftp

or you can edit define('WP_DEBUG',true) on wp-config.php to see error message

for facebook, add og(open graph) tags ex :
<meta property=”og:type” content=”article” />
<meta property=”og:url” content=”URL” />
<meta property=”og:title” content=”TITLE” />
<meta property=”og:site_name” content=”SITE NAME” />
<meta property=”og:image” content=”FEATURED IMAGE” />
<meta property=”og:description” content=”DESC” />
on your header.php

how about permission?
755 for folder
644 for file?