With trying to migrate from using Kodi on Windows to using primarily LibreELEC, along with a Windows installation to boot to time to time, I'm running into some issues getting things to play nice. I followed the instructions HERE. Unfortunately, I get "Boot Error" in the top left of the screen when trying to boot the LibreELEC partition. Booting to Windows from the menu works fine. I've already confirmed that the LibreELEC boot partition still has the boot flag.
I've read that sometimes OS's don't play nice when installed differently (EFI vs Legacy), but this motherboard is so old that it doesn't support UEFI, and thus both OS's were installed in Legacy.
Ideas?