Login to TP LINK wap

I have a TP-LINK AC750 Wireless Gigabit Access Point, Model AP200.

I used to login to the wap by using an ethernet cable directly from the wap to my pc and the in Chrome using "tplinkap.net" to open the wap mangagement app (after turning off the wifi on the pc).

Now all I get is unable to connect to device.

TP LINK suggests that I wire the wap to my pc, turn off to pc wifi then use tplinkap.net to open the management app?????

Has anyone any advice please?

Please don't reply.

Left problem to do something else when I noticed I have connection to wap by wifi; I used ethernet wired before because I could not seem to get a wifi connection to the management app.

Oh well all OK now.