External tracked URLs not redirecting

[aladrach]

I'm using IA to track visits to external web URLs, and it had been working in the past. I'm not sure what may have changed. It still works on my local dev (Laravel Valet). No errors in the Craft or PHP logs, just a white page. The link can be found in the sidebar here under Contact Information and Website: https://mimivanderhaven.com/businesses/vanek-plastic-surgery

The generated URL that displays the white page is here: https://mimivanderhaven.com/instantanalytics/eventTrack?url=http%3A%2F%2FMentorPlasticSurgery.com&eventCategory=website-click&eventAction=click&eventLabel=https%3A%2F%2Fmimivanderhaven.com%2Fbusinesses%2Fvanek-plastic-surgery&eventValue=Vanek+Plastic+Surgery

[aladrach]

Here's the templating used to create the link:
{% set trackingUrl = craft.instantAnalytics.eventTrackingUrl(websiteUrl, 'website-click', 'click', entry.url, entry.title) %}