i created geoprocessing service using model builder and custom python script, when i added the published geoprocessing service to ArcGIS web builder its working fine, and its producing two output, csv file and feature class, now when i trying to add the output feature class to ArcGIS Portal content i received error saying Unexpected token '<' , i also checked the logs for arcgis server and arcgis portal and there was no logs for this issue, i tried also to export the result to feature collection and added as item to arcgis portal and again i am facing another error saying GeoJson doesn't have 'type', then i tried to export the result as geojson and add it as item to arcgis portal and it works, so my question why i cant add the output to the portal content and what this error mean Unexpected token '<'