nexbox installtointernal issue

Hello , sorry if i m posting this at wrong place but couldnt find any info .

I have a nexbox s905x 2gb 8gb rom tv box,i have my SD card ready with libreelec 8 build ready and i m trying to issue the installtointernal command

but i get this message in putty :

Backing up device tree...done.

Formatting SYSTEM partition...The file /dev/system does not exist and no size was specified.

what am i doing wrong ? i couldnt find any info anywhere and i m total noob with ssh.

As in android using root browser i see a system folder as data/system is that the same as dev/system? there is also a system folder placed at first directory as i open the brower.

can i issue the installtointernal command to look there somehow?

i tried another sd card with a nand dtb this time , same outcome.

here's the logfile....

furthermore when i shutdown libreelec the next boot is with android allways and then i have to shutdown android and the next boot is with libreelec etcetera ... :o

this happens every time .

i tried different SD ,nand dtb , even updated android firmware

The only way to boot to Libreelec every time is to pull out the power cord, normal shutdown from remote or cog wheel will make the next boot to Android.