When you navigate to Contents ► Folders ► SAS Content ► Users in SAS Environment Manager, the interface suspends or becomes unresponsive.

In the browser developer tools (Network or HAR), the following error or similar authorization-related request failures also occur: 

I/O error on POST request for "/authorization/decisions"

This issue is caused by high authorization evaluation overhead in SAS^® Viya^® environments when the number of objects and identities being evaluated is high.