Dumb AP on Netgear WNDR4300v1

if this is the current setup (of the main router) you will have to follow what was told in the post:

since no vlans have been created for traffic ...

ps: I see that your "NETGEAR WNDR4300" has not yet switched to DSA, it will be more complicated since I don't have any routers at hand that are still on "swconfig"

https://firmware-selector.openwrt.org/?version=SNAPSHOT&target=ath79%2Fnand&id=netgear_wndr4300