Dashboards not refreshing

Thanks for getting back to me Vicky.

When I was having this issue, I was in a 2 person workgroup where we were both set to admin, and could edit etc.

I had shared (external to our org) a customer dashboard that stopped working for them on the same day as the refresh issue. 

I finally had to move that dashboard in to my own workgroup, and re-share a new link.  This seems to work. However I am not sure why this wouldn't also work from my shared workgroup.

Thanks again,