Unable to download data in ArcGIS Enterprise Sites, as the credentials are not carried over.

Solução Provisória

Workaround 1:

1. Click on the Open button, next to download. 
2. Navigate back to the download page in ArcGIS Enterprise Sites. 
3. Refresh the page. 
4. Item is now downloadable. 

Workaround 2: Sharing the item with Everyone (public) resolves the issue as well.

Etapas para Reproduzir