Issue with PKHeX loading Omega Ruby Save I haven't touched in a while

[Tua0]

I just started homebrewing my old 3ds after years of not using it and wanted to try using pkhex to modify the saved file of my Omega Ruby game. However, every time I try to open the 'main' save with pkhex it gives me this error: 'Invalid save file loaded. Aborting.'

For extra info: my 3ds is from America, the game is from the e-shop so it is saved in the sd card, and this is the first time I have ever tried homebrewing/pkhexing the game. I used Checkpoint to extract the save as a 'main' file

I hope you can help me with this. This is the main file: https://github.com/kwsch/PKHeX/files/9128981/main.zip
Thanks in advance for any help.

[Kaphotics]

Save data is corrupted; PKHeX is correctly rejecting the data as it is completely malformed.

Extract it correctly and transfer it without damaging the save data. Assuming it is still playable, you are likely not exporting/transferring it correctly. Transferring via FTP with incorrect settings (binary is correct, not ascii text), etc.

[Tua0]

I understand, thanks a lot! I will check if there is any problem with my data transfer