Try a usb stick. Burn the image to usb and try again. If it doesn't work in first usb port try the other. I have the same problem, seems it doesn't work from SD on some boxes.
LibreELEC-S82.arm-LE9-Kodi_18.6.img.gz or LibreELEC-S82.arm-LE9-Kodi_18.5.img.gz for my box? anyways i'll try both and i'll let you know how i get on, again thank you for the help.
so it finds the usb flashdrive but cpmes up with a bunch of yellow text with errors