I understand it works without AIS...
Thing is, AIS works just fine for me and (since you are the only person reporting an issue with it so far) everyone else...
It could be a corrupted inventory cache: clear it.
Otherwise, an obscure HTTP connectivity issue could also be at play (perhaps try disabling "Advanced" -> "Network" -> "Use HTTP pipelining")...
You can also try to toggle (turn on if off or turn off if on) the "Advanced" -> "Character" ->"Restore outfit from COF" setting and see if it makes a difference...