So, I've been really enjoying Zelda Classic, but my save files keep getting corrupted. Here is a screenshot of the error:

This has happened a few times before, and it's starting to get very frustrating because I'm not sure what's causing it, if it's a user error, a problem with the software, a problem with installation, or whatever else it may be. I'm wondering if anybody knows if I can recover my save, or at least knows what is causing the issue in the first place. Thanks.