3.2020 MIPS -RTN66U B1 - Standard Login Not working

Hi,
I flashed my Router now a few times...: freshtomato-K26USB_RT-N5x-MIPSR2-2020.3-AIO-64K.trx
starting with the Original Asus Firmware
It Takes an hour until the Router showes Wlan

If i connect to FreshTomato24 or Direkt via CAT to 192.168.1.1
I cant log in with un: admin pw: admin

what is wrong?
I tried wps+power on reset.
i tried just pressing reset
I tried nvram reset from menue After pressing resetbutton while turning on
I tried turning Off and on.

is it my mistake?

greetings, Jan