an error has occurred App Store

I have installed macOS Sierra 16A319. Just want to update to 16A322. On the forum peoples said that I just need to re-download macOS Sierra from App Store that i reedemed before with 16A319. I tried, but its an error. It says "an error has occurred". How to fix it? How to get latest build?

Replies

Now it says "downloaded" but its not. Its not downloaded or installed.

delete your instaler then go to purchase tab and download from there..(if it see origonal instaler any where on system it says downloaded even on external drive)

I deleted it already, after i installed GM 1 build. I tried to find any parts of intaller. But nothing in my system.