problem in adding geoprocessing custom widget

[MedMZOURI]

Hello guys please I have a problem in adding a geoprocessing custom widget..I only have arcgis online and arcgis server installed ..I don't have portal for arcgis..I shared this geoprocessing service and I can see it in my localhost gis server...I can even select it to be added as a custom widget in web appbuilder..but when I select it and click on "next" I got this message "choose a geoprecessing task" 

[DavidPike]

Can you translate the messages? By custom widget do you actually mean loading a geoprocessing task into a geoprocessing widget?

[MedMZOURI]

Thank you David for the reply..I can't load any of them..I have the geoprocessing service that I have shared ..it is in my localhost gis server..but when I want to add it as a custom widget I can't..but I can add other sample widget from esri public servers..but when it comes to adding from my localhost I can't...is it because I'm not using Portal for arcgis?