@scattagain No worries, I've put a hyperlink in my post leading to the AP mode configuration guide for more clarity.

@Leonardophoenix Here's how to change your TP-Link ID informtion. If you forgot your ooriginal TP-Link ID credentials you may refer to this post.

@Winston-ZM Do you have any other equipment before your TL-WR940N like ISP modem router, firewall etc. ? Your ISP should be able to ping your router WAN IP address from their network without any...

@Anurag-Mishra That's a known limitation - check this post.

In the front is the modem router (TD-W9960). In the back is a wireless router (Archer C80) which is a newer device with more features implemented.

@Noobisha Yep, it should - i just saw your edit when I posted.