I'm so stuck...

When I change the AP to multi-ssid and enable VLAN, everything works, except I can no longer access the interface on WiFi or Ether net

I can see AP on my router

It has an IP address

I have verified its getting port 80 and used the link in my router to attempt log-in

I'm on the same segment
I've updated the firmware

And I spent a few hours with my router/firewall box manufacturer confirming its not the router isolating he VLANS

I"ve tried different devices and cleared my cache

When I try to log in I get "403 forbidden"

I'm so stumped. 

The only thing I can think of is the AP is being smart and isolating the VLANs inside its self, like a auto feauter. 

I've also talked to support and they said they have not idea.

I'm about 18 hours into trying to fix this over 3 days. Any help would be greatly appreciated. Thank you!