Difficulties opening jmpaddin stored on sharepoint site with scripting

[#1]

When I manually open an add-in stored on a sharepoint site I get the following warning, but the add-in will install successfully.

However, when I try to do the same from JSL, I get the following error.   Any ideas how I could get around this?

open("https://elancoah.sharepoint.com/sites/ElancoManagedJMPAdd-ins/addinDepot/hatchery.jmpaddin");

[#2]

You might need to authenticate with sharepoint first first before opening the file, maybe these two posts will help:

How to extract data from an Excel file on Sharepoint? 

Open microsoft office 365 cloud-based excel from JMP/JSL? 

[#3]

Thanks for the reply.  I authenticate by opening the site in a web browser box and then closing the box.  So far I am not having this issue with data files, just the add-in files.