Did you hacked your console? do you know which boot9strap version you use?
Last versions of luma are not compatible with the old boot9strap versions.
Luma 10.0.1 is for the last version of boot9strap AND update 11.8 https://github.com/AuroraWright/Luma3DS/releases/tag/v10.0.1
Luma 7.1 is for...