Installer won't boot but live does

Hi, I’m trying to install lakka on my laptop. It’s UEFI and security boot disabled.

I put the image on a SD card and boot from it.

The live system can be boot under UEFI, unable to boot under legacy mode. But when I press TAB. it shows boot:and nothing happened, after 5 minutes, the system reboot.

Did I do something wrong?

Cheers

at Boot:

you need to type ‘installer’ and press enter…if i remember correctly.

Thank you very much.