We get this question fairly often, and Google makes it easy to find the culprit. If you take your link and use the Google Analytics URL builder to create a trackable link, getting the same error outside of Emma, the error is due to the way your website is handling the tracking, and you'll want to take that information to your IT Team.
Click here for Google's URL Builder. If you use this -- for example, use newsletter as the source, email as the medium and test as the campaign name -- and the URL that's generated goes to the same error page on your site, then the issue has to do with your website.
That URL Builder tool is a great way to at least figure out if it's something that's only happening in Emma, or if it would happen with the link outside of Emma when Google Analytics is added. I hope that helps!