Email links throwing Error: 404 Not Found - The redirect url is empty
Hello,
Our marketing team has been noticing during the QA process yesterday and today that when we click on the links in an email in preview mode in Marketo, we get the following error:
404 Not Found
The redirect url is empty
And the URL that throws the error looks like this:
The error is ONLY appearing when viewing the email and clicking on the links in preview mode, not in test emails sent to our team:

What's strange is the $mktEncrypt.encrypt($mkturl6)....Any idea why this is not encrypting correctly?
Thank you,
LK