Well that does for that theory. Someone else had the same problem, but was downloading from a different site.
He re-downloaded from somewhere else and reinstalled and it worked okay the second time.
Otherwise, let me know when this happens (which Day in the game).
I'm assuming you wanted either Kayla or Rei as an intern?
For the time being, you can get around it like this:
Get to just before where the problem happens.
Then open the console window (shift + o ) and type the following:
$ ES_Intern = "Kayla" (then ENTER)
$ r4 = "Kayla" (then ENTER)
Then hit ESCape to close the console.
Obviously you would use "Rei" if appropriate. The case is critical - enter it exactly as I've shown you above.
Play through the appropriate scene to make sure it works and then save the game.
Let me know if that helps!