Upload Data: Point Layer Shapefile. Unknown Error has Occurred

Upload Data tool works for Polygon and Line .shp files saved from ArcGIS. However, the Upload Data tool provides an error when attempting to upload point layer .shp files.

 

 

Geocortex Essentials version: 4.13.3

 

Browser: Chrome

 

 

Error Log: 

 

Exception has been thrown by the target of an invocation.

 

Value does not fall within the expected range.

 

 

The point shapefile uploaded when tested on the LA County demo site: https://gedemo.geocortex.com/Html5Viewer/index.html?viewer=LACountyPlus

 

 

How can this error be repaired?