Error #5

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hi guys I'm writing this article because I can't access the game despite having bought it regularly on steam, I'll tell you my story, I bought the 2 BOS long ago because I had hardware problems with my pc, nowadays I bought it again and not I can get past the login menu due to an error I think of communication between steam and my account on 2, I think it is due to my refund and right now if I try to access the game it tells me that the keys are not active what a lot strange and frustrating, looking for solutions here thanks in advance