HTTP Basic auth prompts, typically in Safari (FreeNAS-11-MASTER-201802211301 )
It looks like the New UI is loading data via API, and this API: /api/v1.0/storage/replication/
On the main landing page after login is prompting for HTTP Basic Auth.
This might be every single XHR request going back to the API that is having issues.
#2 Updated by David Discher over 3 years ago
A few of the XHR calls are lacking trailing slashes, and resulting in 301 redirects.
The holy web says that this may be related to the safari issue :