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I have the same problem, however, if you choose english as Install language, it works.
 
This is a distributor thing and I don't think we can help. Isn't there a thread in the German forum about this?
 
See link in this thread - sorry I didn't sticky it in the main bug forum or this one.
 
I can only suggest you start a thread in the support forum about this. As this seems to be a unique problem to yourself rather than an actual bug with game.