Hi,
I'm new around here and FreeNAS newbie too; last year I gave it a quick test drive but I was learning so many things at the time I just didn't gave it the time or prior research: I wanted to virtualize it.
This time around I have a sound system that works completely off network storage...
I currently have a "critical alert" in the classic UI. I'm aware of the issue, I'm not worried.
I log out, then log into the new UI, there doesn't appear to be any warning of this critical issue.