The error message usually indicates that the temporary license file (.odm file) that initially downloads has expired.
If this file is not opened within OverDrive Media Console within a few hours, it will become invalid. Please check the following and try downloading this audiobook again from your online account.
1. Check that the system time, date, and time zone are correct on your PC. Because of the time sensitive nature of the download, if the time is off by even a few hours, this could cause the error reported.
2. Clear your browser's Temporary Internet Files or cache. This will clear out the previous download attempt.