I get an 'undefined' message box during checkout in the last step of the checkout

The undefined error usually means an exception content was returned instead of the expected JSON object. This is not the real error, but it means that the checkout system experienced a fatal PHP or server error somewhere in the checkout process and the checkout was interrupted.

To find out what the error is follow these instructions: 

  • If you have Chrome:
  1. Open up the developer tools (by clicking on the page button at the top right of the screen.
  2. Navigate to the Resources section. Turn on resource tracking and filter by XHR type request.
  1. Install firebug if you don't already have it installed http://www.getfirebug.com. If you just installed firebug, refresh the page.
  2. Click on the firebug icon on the bottom right of your screen, and then go to the Console tab. If you just enabled firebug, refresh the page.

Once you find the most recent request, view the response headers. This should show you these error that is actually occurring. If the is not helpful then you may want to  contact MageRewards..

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