Sure, I updated a few days ago and I guess I didn't pay much attention to the fact that the stats widget wasn't loading. It wasn't until I noticed the drop-down menu was not sliding per normal that I decided to check the console.
I am using LiteSpeed Cache and a CDN on this installation.
However, I figured this might have been a caching issue so I went to my CDN and purged it to be sure. Waited about 15 minutes and still had the same error. Which is why I thought it might be a bug.
I was merely installing an add-on upgrade for UI.X 2. Nothing beyond that!