I am not sure if this will work, but maybe try creating a new game with both Sunset Valley, and Midnight Hollow. Save both the meta.data files that come with those games.
Then try replacing the meta.data file with one of the meta files, and then the other. To see if that might help.
We were only able to test this as a test-game. We never came up against this problem before. But in our test-game, we took out the meta.data file out of our working game, and got the game error message: "Cannot load saved game, it may have been saved with expansion pack data which is no longer present" error. It wouldn't let us play the game and it was greyed out.
So that's when we created a new game, copied it's meta.data file to the game that we weren't able to get to play. That seemed to work with no errors and everything was accessible again.
That does stump me as to why it's not working for you. You could try what Dek suggested - Download Midnight Hollow to see if that might help?
MrsFlynn
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I tried reinstalling midnight hollow and it didn't.After that didn't work, I then tried to replace the meta.data file, the game loads instantly and then says a "serious error has occurred"
I'm wonder if the meta file for midnight falls doesn't work for my save file since I originally started in sunset valley