ERROR When Saving a File in PKHex

[TheAdriane]

Does anybody know how to fix this? It shows an ERROR every time I try to save a file in PKHex. I tried deleting PKHex and downloading it again but the ERROR still pops up. It happens to all of my games (GEN 1 to GEN 4). Can anyone help me please.

[Kaphotics]

The top of the error message is the important part.