I was on R089 and noticed that my web interface wasn't working correctly, so I tried updating to AP2-R090, but that didn't fix it (it didn't seem to make anything worse though either).
I first noticed that my password autofill plugin wouldn't work at the login screen, and it always used to.
Once logged in...
Clicking on any of the Tabs at the top doesn't work.
The only things I can click on that react are: Wireless 2.4 and 5, Management, the Securifi Logo, and the "Home" button (not the "Home Mode" button).
Hovering over "Network" shows the error below.
I've tested in multiple browsers, and as mentioned I've restarted more than once (one of them was to do the firmware update).
I've also checked in the Web Console and I do not see any errors being displayed when the page loads, or when I click on anything.