If you still wish to load this save file, quit the game, go to Steam > Properties > Betas and select {0} version in the dropdown. Steam will then download the older game version for you. Any features added into this version will not be available in the previous ones.
Failed to write save data to '{0}': {1}
Ensure that the game has access rights to the save directory and there is enough free space on the drive. Access can be blocked by antivirus software or by Windows feature called 'Controlled Folder Access'.
Failed to save the game '{0}': {1}
If you are using mods, please ensure they are compatible with the current game version. Otherwise, file a bug report including this error message and your logs, so we can investigate.
The save file has an incorrect checksum, which means it is corrupted and cannot be loaded. This might be due to underlying issues with your hard drive or an interruption during the save process.
Failed to validate checksum of save file: {0}. This save is likely to be corrupted and not loadable in the game. Verify integrity of your disk and file system. You can also try to save the game again.