I can't figure out how to add geojson file (from a folder) with this widget nor a custom layer using the transformer, The Tips and tricks documentation is not clear about that, if you can explain in more details.
![](/legacyfs/online/413836_pastedImage_1.png)
Did the widget accept only ArcGIS Rest Services, and AGO.
I also uploaded my json file to my live server(as a file), but still no luck.