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 4.5.7.181275 or 4.5.7.181695, 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.
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Download the update from the Adobe Digital Editions Download site, https://www.adobe.com/solutions/ebook/digital-editions/download.html
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Download the update from the Adobe Digital Editions Download site, https://www.adobe.com/solutions/ebook/digital-editions/download.html