Was quite far in the game, but hadn't played for a few months. All the save slots were empty, so I pasted saved data into the text box, including the <gc0save> / </gc0save> parts, and it says the data is invalid.
I had multiple saves, and tried them all, and it says they're all invalid. I have checked that there is no text before/after the save data.
Your web browser may of have cleared your cookies, so that may be the problem. Try disabling that so the cookies don't get deleted. Or you may need to clear your cache.
When data is lost, generally it's done.. furthermore when your save are invalid I think they were too old maybe the game have been updated during this time and the save couldn't be read.
Don't check the browser box on programs like CCleaner if you're using it because it will erase your cache too ^^
