Here are some questions for you :
1 - Which Windows 10 ISO and EX-100 versions are you using ?
2 - Have you checked the SHA-1 values of your ISO ? In order to be sure to get a valid and unmodified ISO.
2 - Have you integrated windows cumulative updates ?
3 - Have you removed components from "Features" and/or "Services" tabs ?
4 - Have you used the correct serial number for your edition (if you used "Unattended" tab) ?
5 - Have you used "System - Folders" to change all users folders ?
Thank you very much for your answers