brew cask (un|re)install --force may fail, esp. when two bad states coincide: A) Homebrew poorly transitioning to a new location for Caskroom tapped applications; and B) Some Caskroom tapped applications have been "deleted" by non-brew means, such as deleting the *.app in Finder, or using "Storage Manager.app".
Workaround:
$ brew install --force <app> && brew uninstall --force <app>
Workaround x2:
$ brew cask zap <app>