Installing Archlinux

[try2bgr8]

I am having problems getting ArchLinux installed on my Pine Book Pro. I've follows the instructions at boot of these locations
https://github.com/nadiaholmquist/archis.../README.md
https://www.bencode.net/posts/pinebook/

I can reliably boot from the sdcard and mount the root partition and arch-chroot into it, but I can only get the amber light when trying to boot from the eMMC.

Does anyone have any ideas on what I could start looking at to get this working?

[wdt]

On the manjaro forum, thread SPI uboot install ,,IIRR,, last 1/2
Not sure, I think bsp uboot AND manjaro dtb, people write not so clearly