Hello Nat,
You are right I am not able to ping google.com or any other domain. Please check the below images.
Right now AP is just an intermediator for clients - laptops, mobile to connect via AP and access internet via the load balancer.
DHCP is allocated by TPLink load balancer as I can manage security aspects from the load balancer to manage route the traffic to multiple ISP or block the user from mac based filtering or allocation IP on basis of IP-MAC binding etc.
I think this could be the reason of firmware update may be.