Failure in Bootstrapping Xcodeproj

[zhangao0086]

When running rake bootstrap, I get this:

Bootstrapping claide-completion

Bootstrapping cocoapods-downloader

Bootstrapping fourflusher

Bootstrapping Xcodeproj
rake --no-search bootstrap
/Users/zhangao/.rvm/gems/ruby-2.3.8/bin/bundle
bundle install
Cannot use local override for CLAide at
/Users/zhangao/Downloads/Rainforest/CLAide because :branch is not specified
in Gemfile. Specify a branch or use `bundle config --delete` to remove the
local override
rake aborted!
Command failed with status (11): [bundle install...]
/Users/zhangao/Downloads/Rainforest/Xcodeproj/Rakefile:9:in `block in <top (required)>'
/Users/zhangao/.rvm/gems/ruby-2.3.8/gems/rake-12.0.0/exe/rake:27:in `<top (required)>'
/Users/zhangao/.rvm/gems/ruby-2.3.8/bin/ruby_executable_hooks:24:in `eval'
/Users/zhangao/.rvm/gems/ruby-2.3.8/bin/ruby_executable_hooks:24:in `<main>'
Tasks: TOP => bootstrap
(See full trace by running task with --trace)
rake aborted!
Command failed with status (1): [rake --no-search bootstrap...]
/Users/zhangao/Downloads/Rainforest/Rakefile:119:in `block (3 levels) in <top (required)>'
/Users/zhangao/Downloads/Rainforest/Rakefile:117:in `chdir'
/Users/zhangao/Downloads/Rainforest/Rakefile:117:in `block (2 levels) in <top (required)>'
/Users/zhangao/Downloads/Rainforest/Rakefile:116:in `each'
/Users/zhangao/Downloads/Rainforest/Rakefile:116:in `block in <top (required)>'
/Users/zhangao/Downloads/Rainforest/Rakefile:56:in `block in <top (required)>'
/Users/zhangao/.rvm/gems/ruby-2.3.8/gems/rake-12.0.0/exe/rake:27:in `<top (required)>'
/Users/zhangao/.rvm/gems/ruby-2.3.8/bin/ruby_executable_hooks:24:in `eval'
/Users/zhangao/.rvm/gems/ruby-2.3.8/bin/ruby_executable_hooks:24:in `<main>'
Tasks: TOP => bootstrap_repos
(See full trace by running task with --trace)

ruby -v:

ruby 2.3.8p459 (2018-10-18 revision 65136) [x86_64-darwin19]

bundler -v:

Bundler version 2.0.2