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too far Back, I don't remember if there is a solution.

The only solution i can think of is a hassle, and also not guaranteed to work. But if its important enough, you could try downloading each version in-between and saving in each one then moving to the next

There is a solution, but, even then, you are going to encounter more errors down the line anyway, if you don't start a New Game+ (starting over but optionally keeping stats, money, and most items).
Consider if you wouldn't rather just make a new character before continuing to read.

So, to fix this first error so you can at least load in:
-- Make sure the game is not running.
-- Find any image file with ".png" extension.
-- Create a copy and rename the copy to "p-zbrow1"
-- Move this dummy file to [game directory]\Lust Doll Plus [newest version details]\www\img\faces
-- Search through the old versions folders for "p-zbrow1.rpgmvp" and move that over too.
Assuming everything is in the right place, your old save should now load into the new version.

Your save files are from too many versions back and isn't compatible anymore. If you're on desktop though, you can navigate to the folder with the missing file, and put a dummy file in there to trick the game into thinking everything's fine. Then just save your game and it should work.

So basically what tiny Dracula said