Error installing


I tried installing this a month or so ago, kept getting errors and gave up. I've since added a new XF (1.1.5) install and tried again. Same problem.

Here's the error message when using Chris Deeming's Addon installer:

Server Error

String could not be parsed as XML
  1. SimpleXMLElement->__construct() in AddOnInstaller/Model/AddOn.php at line 0
  2. AddOnInstaller_Model_AddOn->getXmlType() in AddOnInstaller/ControllerAdmin/AddOn.php at line 141
  3. AddOnInstaller_ControllerAdmin_AddOn->actionInstallUpgrade() in XenForo/FrontController.php at line 313
  4. XenForo_FrontController->dispatch() in XenForo/FrontController.php at line 132
  5. XenForo_FrontController->run() in /var/www/vhosts/ at line 13

If I do it the other way, extract the zip on the server then add the XML, I get


The files associated with this add-on could not be found. Please upload them and try again.

Sorry for the noob question, but what might I be doing wrong?