If you see an error message, "Errors were encountered with this item" or "RET_RECORD_CORE_INVALID_CLIENT_CERT" , while opening a book in Adobe Digital Editions versions 220.127.116.11275 or 18.104.22.168695, follow the steps defined in the section, Solution.
The error occurs due to the expiration of an Adobe Digital Edition certificate.
If you have issues in activating Adobe Digital Editions in your devices, see the section, Solution.
Update to a new version of Adobe Digital Editions.
Follow the steps below to update to a new version.