This error typically occurs in Decile Hub when required data (such as prospect details) is missing or incomplete, preventing the system from generating a valid PACT link in your email template. To resolve this, ensure all necessary fields are filled in the prospect's profile before sending the PACT email. If the issue persists, report the error (including the error ID) in the Decile Hub Support channel for further assistance. For more information and support, visit Decile Hub Support.