R8000 - impossible to install

Hi,

I just pick up an old R8000 (certainly with old firmware (I installed it a few years ago, perhaps 6 years, in my office)

I reset it, and wanted to setup it up at home.

I want to use it as a wifi + eth switch and not as router.

So I reset the R8000 (pressing the reset button for a few seconds).

The initial wifi network appears after a few minutes of booting.

With my laptop I connect on the netgear wifi.

Then I open up a browser and a page for configuring the R8000 appears.

BUT, once I choose to use it as acces point, I can change the ssid and password of the wifi, it reboots, and then impossible to login to the R8000

If I check the ip adresse of the R8000 (192.168.1.123) and try to connect to it : it says error 404, server error.

So impossible to get access to the Router to do an update or configure anything.

the routerlogin.net adress goes nowhere.

I try with nighthawk app on my phone, but the router can not be found !!!

So If someone can take a few moment to explain me how to do it ?

Thank you very much for your help.