I had created an Experience in ArcGIS Experience Builder Developer Edition. I had follow the documentation from here https://developers.arcgis.com/experience-builder/guide/deployment-topics/ to download the Experience so I can share it in my ArcGIS Portal Organization.
But, I had encountered from the very beginning where I could not download and it is simply error which is
"Not Found"

May I know where I had gone wrong?
Thank you in advance.