Yes it either tells me DumaOS is not running or No Such File or Directory when I try to access it the normal way, when I do the adv_index it goes to the factory reset setup.
I was having some issues, so I rebooted the router, when it finished I noticed I had no internet, I went to 192.168.1.1 and it said DumaOS Not Running...I tried another reboot to see if that helped which didn't. Then I tried to reinstall the firmware, and it was saying No Such File or Directory, so I started googling for solutions and found the adv_index.htm solution, and tried to factory reset that way. After that it started doing the factory reset thing. Thats all as far as I can remember.
I can get into the interface sometimes after a factory reset, but I have tested and as soon as I reboot the router, it just repeats the same things.