As of now the Setup Wizard is known to be broken across multiple devices on CM14.x.
The solution for now seems to be removing /system/priv-app/CyanogenSetupWizard
from your recovery. But the trick is that you shouldn't just delete it; instead, move the folder elsewhere for backup, then boot up into the OS properly. You will notice things like the notification bar and recent keys working weird. Don't worry - boot into recovery again and place that folder back to where it was, and set correct permissions (rwxr-xr-x for folder, rw-r--r-- for file). Reboot and you should see the Setup Wizard briefly come up but goes away if you interact with it. That's it - now start using the phone as you would normally.