This error indicates that the date and time stamp on your computer is incorrect.
One of the following system settings (or a combination of them) causes this error:
- incorrect clock time
- incorrect date
- incorrect time zone
You can correct the information on your computer to reflect the date and time stamp from the day that you purchased your book.
If you continue to encounter an error, please contact our Customer Support team at 866-297-9095 or email firstname.lastname@example.org