This error message is received when there is an issue with the authorisation of your Adobe Digital Editions software.
To fix the issue you need to first deauthorise Adobe Digital Editions and then authorise it again.
Please follow the steps on this help page to deauthorise Adobe Digital Editions.
Please follow the steps on this help page to authorise Adobe Digital Editions again.
If you are still having difficulty deauthorising please contact our support team.
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