One last thing now. I can connect the wireguard VPN using the official wireguard client and it's all good. Though I also tested Omada VPN client and configured similary even though it's shows...

Okay got it. Used an free LAN IP from default vlan (1).

Okay I'll be fixing the port forwarding but I still have the question: Which IP should I be entering the in the Local IP Address field? My routers LAN IP? In this case the actual LAN IP or the LAN IP...

I've upgraded my router to 1.1.0 and I can now see the wireguard option. Though I couldn't find an up-to-date documentation for the feature. What IP adreess should I be entering for the Local IP...

@Clive_A I've purchased my equipments from Turkey and following the instructions I do only try to follow the firmware list from the Turkish tp-link site which lists the latest firmwares for ER8411...

@Virgo strange on my side, per client limiting is working all good when I try the per SSID limiting it does not work.