@kwetiaw Welcome to the Rockstor community forum.
Thanks for the feedback; the installer was updated on the release of the 3.8.16 iso which generally helped in it’s stability but it looks like in your case there was a regression. All I can suggest for now is the work around of installing 3.8.15, then pick an update channel as prompted then update to a 3.8.16 release (latest). You should end up with the same thing, just remember to reboot after each update as we still have Rock-on issues directly after each update until after a reboot is performed. Plus if there are any kernel updates these will need to be put into effect in that reboot.
It may be that others have a more elegant fix / workaround but for now that’s all I can suggest.
We do have an open issue to upgrade the installer again so hopefully this will help in your case. But there is no firm schedule on this:
Hope that helps.