4 Replies Latest reply on Jul 24, 2019 4:57 PM by Manfred Berndtgen

    "invalid pin/activation code"

    Manfred Berndtgen

      This seems to be a familar problem: I want to register my book (AWS Certified Solutions Architect Study Guide, 2nd ed.; ISBN 987-1-119-50421-4), managed to receive that e-mail that got me an access code, and I even registered a new account (that's mberndtgen@gmail.com) at efficientlearning.com, but unfortunately the journey stops when I want to have my access code activated:



      If somebody would please help me here... thanks a lot in advance!