With my image you need to run
setenv mtdids nand0=nand0 && set mtdparts mtdparts=nand0:0x1A000000@0x2400000(firmware) && ubi part firmware && ubi read 0x44000000 kernel 0x6e0000 && bootm
saveenv
after flashing then reboot
That image doesn't have luci or anything extra installed. I'm rebuilding a new one with some extras