I have started to use Joomla in my ISP host on a web domain I don’t use. However, every single template I load up to practice on has the following error, the template being the unique part each time.

'Fatal error: Call to a member function getMessageQueue() on a non-object in /home7/southff0/public_html/templates/xpcat/functions.php on line 11'

Mostly line 11, sometime line 17. No idea what it is and cannot find it in Google. So far have certainly learned how to load templates and then uninstall them in extensions. Doesn't make any difference.

Any ideas?