That's great to hear! Alright, follow these steps:
First, open the local files for your Tailor Tales. Find the folder you installed it to, and browse to this location:
Tailor Tales > www > save
In that folder, you should see several files. Your "file1.rpgsave" is corrupted at the moment. But there's two other save files in there, one is called "file2.rpgsave" which is your quick save (probably also corrupted?). And then there's "file3.rpgsave" which is your back-up file (it saves each time you enter the main menu). If file3 is also corrupted, then you're out of luck :(
Anyways, what you should do is rename "file1.rpgsave" to something else, call it "file1_corrupt.rpgsave" if you'd like. Then, rename your "file3.rpgsave" to "file1.rpgsave" so that the game will read this (backup) file when it tries to load your manual save file. That's all you need to do. Start the game and load your manual save file. And let's hope it works and doesn't show you the error.
If you still have the same error, I'm sorry, it seems all save files got corrupted (you can try loading your quick save though?), and you would have to start a new game. On the bright side, I added two cheat codes for you! If you enter the main menu and type in either "Neil" or "Dimitri" as the password when you click the gift button in the settings, it will unlock that character for you (including all CGs), so you don't have to replay them.
No such cheat exists for Caine though, sorry.
Please let me know if it worked!