I can't load my pokemon black 2 save file.

[Null DreiAcht]

I owned a physical copy of White 2, but it was the French version. I need an English version for transferring pokemons from earlier gens to Home. Since I don't have much budget right now, I though that using a Black 2 Rom on my R4 was the best solution. So I started a game, but lost my data after my game crashed and I didn't think to make any backup.

Since it's impossible to fix the save, or at least I didn't anything about that, I decided I would try to create a copy based on my current progression. So I download pkHex to check the stats of all my pokemons and my overall progression. But, pkHex won't load the file.

Pokemon - Black Version 2.sav