I'm on a Japanese N3DS XL (not region swapped) and every time I launch Zelda ALBW I get this error. I've already tried redownloading the game from multiple different regions. Any help would be appreciated.
Yes, all other games work perfectly.Do other games work correctly? Have you enabled any cheats?
Maybe it is an SD card Problem, because when h2testw was writing I kept getting this errorWell, at this point you can't rule out an SD card problem. There's no other obvious reason why it wouldn't work.
Connect the SD card to your PC, copy everything off the SD card with Roadkil's Unstoppable Copier, format the card, test the empty card with h2testw, and copy everything back if the test is okay.