I can’t believe it, but I just figured out what was causing the issue. The errors were indeed caused by gzip. I just noticed that you can modify the compression method in the dialog box before exporting.
So, in order for scan data to work within Cesium for Unreal, set the compression method from “Gzip” to “None”. I can now load tiles with no issues inside Unreal Engine!
Thank you all for your help! I’m glad we can check this one off the list. 
