We currently have an open bug with the Add Data widget in Web AppBuilder Developer Edition and using it with Portal for ArcGIS 10.5.1 (BUG #000105062) when attempting to add a shapefile. Although we've seen different error messages returned. Can you please contact Esri Tech Support, m...
I haven’t really found a good way to transform KML files to shapefile format, and certainly not one that preserves most of the attribute information or data associated with the shapes in the KML file. But I’ve come up with a mildly painful, multi-step hack that will allow you to conv...
1) the actual field names are in the first screenshot in my first message in the topic. 2) i will try to publish directly from ArcGIS Pro, maybe as you say this will help to maintain the real names. 3) i did not understood what you are saying in the last sentence: ...