I have a couple of Excel files on AGO which can be downloaded directly from AGO but cannot be downloaded through the Hub.
On the Hub, I can get to the page that has the Overview of the item and a Download button, but when I click the Download button, it says "This site can't be reached".
All my other hub items are applications which link to outside resources. This is the first time I have tried to link to an item that I have uploaded to AGO.
Here is one of the items:
The item from the hub: FPR to HUC8 Bridge Table (TWDB)
The same item on AGO: https://twdb.maps.arcgis.com/home/item.html?id=1320a6387d974f7a9dad9279368e7910
I needed to take the additional Publish step. However, it seems that each sheet of a multi-sheet excel file must be published separately. A solution to this for the Hub is to refer to my own unpublished item on AGO through a Web Application on AGO. (In my particular application, my hub is usually listing items by other owners and the Web Application on AGO is the way to do this.)