What causes empty 'Confirm Sharing Change' Dialog?

[RichardHughes2]

Hi,

In ArcPro 2.5.1 when publishing a Web Tool, I can be successful.  However, sometimes when I am working on publishing multiple tools during testing of a larger model, I run into this issue.

The 'Confirm Sharing Change' Dialog is empty.  If I click Yes, The 'Share As Web Tool' Pane Opens and a spinning wheel appears, never to go away.

At this point I restart ArcPro.  

Any ideas what could be causing this?