Help I'm stuck

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Check out these instructions to load a backup

How to load your backups

Occasionally you may get stuck somewhere you can’t escape from or come across an error in your game that reads End of File reached, or incompatible marshal format. This most likely means that your save is corrupted, and you will have to load a backup. If your save is corrupted, don’t panic just yet. Every time you save, the game will keep your past 3 saves as backups, and these can be used to recover a corrupted save file. If you are on Windows and your file extensions are not enabled, follow …

Edit: If backups really don’t work you can try opening the game in 1.2.3 and using the Memory Chamber, although this should be a last resort.