@mizarcs Let’s start from a clean state.

1. Reset the router: with router powered on, press and hold the Reset button for about 10 seconds then release.
2. After the router reboots, connect a PC to the router and load http://192.168.10.1
3. You’ll be asked to do initial setup.
4. Can you select time zone during initial setup?
5. After initial setup, log in and load the System Settings page. Can you select time zone?