Battle.net installers fails with unexpected error resulting in installing wineprefix, but not listing it in phoenicis's Library.
STEPS TO REPRODUCE
Install any battle.net application without .executable(Battle.net.exe). Log-in -> Error occurs prior to log-in.
WORKAROUND
using .executable(Battle.net.exe) fixes the issue, but launches the Battle.net instead of the game -> Expected compatibility issues with end-users installing games on battle.net due missing dependencies in wineprefix that is optimized for other title.
EDIT: same error appears if the Battle.net installer is already installed.