@alzhao

I am not sure what is the problem you met.

The problem I was met is that GL GUI does not exist. Luci yes, GL no.

It looks very good and I go to 192.168.8.1 and I enter password and then I must log in and I enter same password but nothing changes.

I can go 192.168.8.1/cgi-bin/luci and I have luci but there is no web interface.

Which old firmware did you upgrade from?

I do not remember now. Probably v1 or maybe Tor. Both ones are possibles.

Can you clear all settings and try again?

Yes, but please explain the exact steps you want I will take because then I can know we do exact same steps.