I solved that by using the boot.firm from an Animal Crossing hack. Download the file by clicking the link and then just replace your old boot.firm with the new one. That's what worked for me on a 11.4 3DS with Luma 10.2im having the same problem but its on mario kart wii 3ds. Error code 0xD8E07402
https://cdn.discordapp.com/attachments/360861723361542144/681026525893623839/ACNL-NTR-Cheats.zip