Hi,
There are lots of error codes that occurs during or after updates, and they are normally solved by performing Windows Update Troubleshooter. There are a few troubleshooting that can also be performed if the issue persist after using the update troubleshooter, such as downloading latest SSU, fixing Windows file corruption, or performing in-place upgrade. These troubleshooting steps are available on this link.
Regarding your concern about if it has something to do with updating from 1607 to 1709, you can check this article about How to Upgrade to Windows 10 Version 1709 Fall Creators Update Using ISO File from Versions 1703, 1607, 1511 or 1507.
Let us know if you need further assistance.