Error 01: Not running on the SD Card root. /Nintendo 3DS/ not found.
Error 02: Write protected SD Card. Ensure switch is facing up.
Error 03: Attempting to change target console version during exploit.
Error 04: No Home Menu Extdata. Shouldn't happen pretty much ever.
Error 05: No Mii Maker Data, follow MSET9 Troublshooting page.
Error 06: Not enough free space on disk. Clean out unused files.
Error 07: Multiple ID0s, follow MSET9 Troublshooting page.
Error 08: Missing/Malformed file. Reextract MSET9 zip file.
Error 09: Could not change back into SD directory. Ensure the SD Card has been reinserted.
Error 10: Database problem. Follow the troubleshooting to reset the DBs.
Error 11: Running as MacOS. MacOS is not supported.
Error 12: Multiple ID1s, follow MSET9 Troublshooting page.

MSET9 Troublshooting Page: https://3ds.hacks.guide/troubleshooting#installing-boot9strap-mset9