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Why is it that the message Invalid Activation Code appear even I used the purchase activation code to unlock my ebooks?

April 26, 2017activation appear code eBooks invalid message purchase unlock Used

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Why is it that the message Invalid Activation Code appear even I used the purchase activation code to unlock my ebooks?

1 Answer

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It could be caused by connection interruption, your system application such firewall, antivirus could have block it from accessing the e-books.