Thanks Michelle for your continuous help..actually I solved the problem related to publishing services and running them on web appbuilder..I don't have this problem anymore (thanks to web adaptor and all what you have just mentioned about SSL certificates) But now I got a new problem which is I created a model and I run it with no error both in arcgis desktop and web appbuilder, my model creates a feature ( a square given XY coordinates) and inserts it in a layer , it runs perfectly in arcgis desktop, but in web appbuilder no square is created
Thanks Michelle