Hi,
For reference here is a link of an old post of mine : KHADAS VIM3L gives me headaches ... small issues though!
Since then i found a clean way to install latest CE to eMMC :
→ Burn latest official Android 9 image from dl.khadas.com - Index of /products/vim3l/firmware/android/ using Amlogic USB Burning Tool
→ Burn CE 19.5-Matrix Final from https://github.com/CoreELEC/CoreELEC/releases/download/19.5-Matrix/CoreELEC-Amlogic-ng.arm-19.5-Matrix-Generic.img.gz to a SD card
→ Boot CE from SD card and ssh into your VIM3L, then run ceemmc tool : it will install CE to eMMC
→ Boot CE from eMMC and then you will have two choices for updating CE : for 20.5-Nexus it’s possible to do it using embedded CE updating tool and for any new CE release you will have to download the desired tar update package from CE website and copy it to /storage/.update folder using scp through a terminal
This way you will have CE installed to eMMC on your VIM3L with all issues from my old reference post gone.
Hope this can help.
Regards
PS : ceemc tool does fail if you install a CE version newer than 19.5-Matrix Final, that’s why i install it first and then update it from eMMC.