Ran into the same problem and was able to temporarily solve the issue by saving over all previous saves (which gave an error and blanked them) and then saving in the original slot. This only worked on...
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Ran into the same problem and was able to temporarily solve the issue by saving over all previous saves (which gave an error and blanked them) and then saving in the original slot. This only worked once. And, of course, I only had two saves so it wasn't too daunting. A real solution would be great.