Unknown error 8392
MacBook Air running Sierra 10.12.1, iTunes 12.5.3.17
Open Apps/ Updates
I try to update an individual App and it fails immediately with "Unknown error 8392"
I attempt a couple more times and it updates!
This was the case on the previous level of iTunes as well.
MacBook Air (11-inch Late 2010), macOS Sierra (10.12.1)