Issues with Slate AX (GL-AXT1800) Router in Access Point Mode

I recently updated the firmware on my Slate AX (GL-AXT1800) router and switched it to access point mode. Since then, I have been unable to log into the router’s interface to switch it back to router mode.

I have tried the default login credentials and checked the IP address assigned by my main router, but I still cannot access the settings.

Could you please provide guidance on how to:

Access the router’s interface in access point mode.

Press and hold the reset button to revert to router mode