Fix MODx error after website transfer

General information for the website: fixing a php error on a MODx website and subdomain errors on wordpress
Description of every page/module: Hi there, I have transfered a MODx website and database, got them linked in and working when it was on a temp url it was fine and now it throws an error see below

There is also a subdomain of blogs. which I have made and put the wordpress in there and connected the DB, however the site loads but none of the sub pages load, just an error 404 for pages.

The website is live now so needs fixing ASAP
Description of requirements/features: « MODx Parse Error »

MODx encountered the following error while attempting to parse the requested resource:
« PHP Parse Error »

PHP error debug
Error: DOMDocument::load(): Document is empty in http://blog.asphaleia.co.uk/category/general/feed/rss/, line: 1
Error type/ Nr.: Warning - 2
File: /home/sites/asphaleia.co.uk/public_html/manager/includes/document.parser.class.inc.php(814) : eval()'d code
Line: 54
Extra notes: