Strange problem, especially with something as basic as adding a new user.
Brand new installation. when adding a new "People", "allow login" switch shows a red circle with a diagonal line through it. So I can't add a user, but I can add a People.
After manually adding the user in terminal, the HA add People still doesn't allow the login switch.
Installation method Home Assistant OS
Core 2026.5.1
Supervisor 2026.04.2
Operating System 17.3
Frontend 20260429.3
I had HA a week ago, and started over. The old version didn't have this problem.
I tried logging into HA with incognito, but the same problem.
I was having the same issue. Appreciate you sharing the insight about the users tab.
Something about the UX here changed but yeah I can confirm, you can start new user creation from the user tab (add people later) and everything works fine.
a workaround is to right click the switch, Inspect, find the <input> and delete the disabled attribute. Then you can toggle it even though it looks disabled, or you can also to delete the class="disabled" on the parent <label>.