Same problem as this thread:

https://community.tp-link.com/en/home/forum/topic/606638

Basically, I go to NAT forwarding, Port Forwarding, + and then when I enter for example:

Service type- Custom or HTTP (I have tried both of these)

Service Name- Wildermyth

Internal IP- Client IP address

Internal Port- *blank* (This is supposed to be automatically updated to be the same as external if left blank)

External Port- 24100

Protocol- TCP & UDP // TCP

The option to save never lights up, and if I press the Save button nothing happens.