homebrew-cask-upgrade: Error: uninitialized constant Hbc

brew cu

Error: uninitialized constant Hbc /usr/local/Homebrew/Library/Taps/buo/homebrew-cask-upgrade/lib/extend/hbc.rb:3:in<top (required)>’ /usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.3.7/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in require' /usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.3.7/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in require’ /usr/local/Homebrew/Library/Taps/buo/homebrew-cask-upgrade/lib/bcu.rb:6:in <top (required)>' /usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.3.7/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in require’ /usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.3.7/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in require' /usr/local/Homebrew/Library/Taps/buo/homebrew-cask-upgrade/cmd/brew-cu.rb:32:in <top (required)>’ /usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.3.7/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in require' /usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.3.7/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in require’ /usr/local/Homebrew/Library/Homebrew/utils.rb:19:in require?' /usr/local/Homebrew/Library/Homebrew/brew.rb:95:in <main>’ `

brew cask doctor ==> Homebrew Version 1.7.3-57-g132aa14 ==> macOS 10.13.2 ==> SIP Enabled ==> Java 10.0.2, 10.0.1, 10, 9.0.4, 9.0.1, 9, 1.8.0_144, 1.8.0_141, 1.8.0_131, 1.8.0_121, 1.8.0_112, 1.8.0_92, 1.8.0_77, 1.8.0_74, 1.8.0_45 ==> Gatekeeper support Enabled ==> Homebrew Cask Install Location <NONE> ==> Homebrew Cask Staging Location /usr/local/Caskroom ==> Homebrew Cask Taps: /usr/local/Homebrew/Library/Taps/homebrew/homebrew-cask (4046 casks) /usr/local/Homebrew/Library/Taps/homebrew/homebrew-cask-versions (195 casks) /usr/local/Homebrew/Library/Taps/homebrew/homebrew-cask-fonts (1175 casks) /usr/local/Homebrew/Library/Taps/homebrew/homebrew-cask-drivers (151 casks) ==> Contents of $LOAD_PATH /usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.3.7/lib/ruby/gems/2.3.0/gems/did_you_mean-1.0.0/lib /usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.3.7/lib/ruby/site_ruby/2.3.0 /usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.3.7/lib/ruby/site_ruby/2.3.0/x86_64-darwin9.0 /usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.3.7/lib/ruby/site_ruby/2.3.0/universal-darwin9.0 /usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.3.7/lib/ruby/site_ruby /usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.3.7/lib/ruby/vendor_ruby/2.3.0 /usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.3.7/lib/ruby/vendor_ruby/2.3.0/x86_64-darwin9.0 /usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.3.7/lib/ruby/vendor_ruby/2.3.0/universal-darwin9.0 /usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.3.7/lib/ruby/vendor_ruby /usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.3.7/lib/ruby/2.3.0 /usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.3.7/lib/ruby/2.3.0/x86_64-darwin9.0 /usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.3.7/lib/ruby/2.3.0/universal-darwin9.0 /usr/local/Homebrew/Library/Homebrew ==> Environment Variables LC_ALL="en_US.UTF-8" PATH="/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/Homebrew/Library/Homebrew/shims/scm" SHELL="/bin/zsh"