Well, you are using A9LH with sysNAND at 11.0, right? Download
this, if you are using Luma3DS, rename it to "LEFT_AGBSave9.bin", put inside /luma/payloads and turn your 3DS on pressing Left on D-PAD, if you are using something and don't have a bootloader, rename it to "arm9loaderhax.bin" and copy to the root of your SD card(Backup that file in your SD card before you do that), it should load AGBSave9 directly.
I just tested it on my 3DS and I'm sure this payload still works, with Delibird's A9LH v1.