@4St_Uv8 Same problem. I have TP-Link main router and am adding TP-Link router for access point. AP is connected by ethernet cable to  main router. When I go to log in to AP router I connect with main router. How do I log in to get to control panel of AP router?

  @kleem 

Hi,

If you have more than one TP-Link router and http://tplinkwifi.net opens the login page of the "wrong" router, then you need to use the LAN IP address of the router you want to access instead. For example, if the IP address of the AP router was 192.168.0.100, then enter http://192.168.0.100 (or just 192.168.0.100) into the address bar of the web browser. If you don't know what the IP address of the AP router currently is, then log into the main router and see if you can find the IP address of the AP router in its "Clients" list.

  @woozle OK, I found the ip address of my new router, http://192.168.0.105, connected to it and changed mode to Access Point. Once mode was changed I typed http://192.168.0.105 into the browser and it changed to

 http://192.168.0.105/webpages/login.html?v=62c60c5d

This site can’t be reached

192.168.0.105 took too long to respond.

How do I access my AP router?

  @kleem 

It is normal that changing the operation mode also results in the IP address changing.

To find the new IP address you will need to check again on the main router to which the AP router is connected to.

Below as example a screenshot of a BE550 router that has an Archer AX53 router in AP mode connected to it.

  @woozle Yeah, but now I can't log into my main router. Tried all of the following to now avail:

http://TP-LINK_OCDF 

and

http://tp-link_ocde_5g/

and

https://tplinkwifi.net/

and

http://192.168.0.101/

  @kleem I got in by switching browser to Firefox (was using Brave). 

  @kleem  . . . but can't connect to AP router, client 1. Type http://192.168.0.111/    in Firefox and get

"The server at 192.168.0.111 is taking too long to respond."