Encountering the Error "Template Cannot Be Downloaded" When Using the Send Email Action

Update the Object Metadata Cache configuration for the following objects:

• ContentDocumentLink - Set the attachment download method to Background.
• LifeSciEmailTmplSnapshot - Set the attachment download method to Cache.

After saving these changes, retry the Send Email action and verify that the email template downloads successfully and the email can be sent without errors.

Reference

For more information about configuring the Object Metadata Cache for Life Sciences Cloud, refer to the following documentation:

https://help.salesforce.com/s/articleView?id=ind.lsc_email_dbschema_metadata.htm&type=5