I have installed RhoStudio on OS X as per instructions at Rhomobile | Install RhoMobile Suite but when trying to build a new app, I get the following error in the RhoStudio console.

PWD: /Users/admin/.rvm/gems/ruby-1.9.3-p551/gems/rhodes-5.5.0.3
CMD: rake token:check
rake aborted!
Don't know how to build task 'token:check'
/Users/admin/.rvm/gems/ruby-1.9.3-p551/bin/ruby_executable_hooks:15:in `eval'
/Users/admin/.rvm/gems/ruby-1.9.3-p551/bin/ruby_executable_hooks:15:in `'
(See full trace by running task with --trace)
RET: 1

In the terminal, with --trace it returns the following:

$ rake token:check --trace
cd /Users/admin/.rvm/gems/ruby-1.9.3-p551/gems/rhodes-5.5.0.3
rake aborted!
Don't know how to build task 'token:check'
/Users/admin/.rvm/gems/ruby-1.9.3-p551/gems/rake-10.4.2/lib/rake/task_manager.rb:62:in `[]'
/Users/admin/.rvm/gems/ruby-1.9.3-p551/gems/rake-10.4.2/lib/rake/application.rb:149:in `invoke_task'
/Users/admin/.rvm/gems/ruby-1.9.3-p551/gems/rake-10.4.2/lib/rake/application.rb:106:in `block (2 levels) in top_level'
/Users/admin/.rvm/gems/ruby-1.9.3-p551/gems/rake-10.4.2/lib/rake/application.rb:106:in `each'
/Users/admin/.rvm/gems/ruby-1.9.3-p551/gems/rake-10.4.2/lib/rake/application.rb:106:in `block in top_level'
/Users/admin/.rvm/gems/ruby-1.9.3-p551/gems/rake-10.4.2/lib/rake/application.rb:115:in `run_with_threads'
/Users/admin/.rvm/gems/ruby-1.9.3-p551/gems/rake-10.4.2/lib/rake/application.rb:100:in `top_level'
/Users/admin/.rvm/gems/ruby-1.9.3-p551/gems/rake-10.4.2/lib/rake/application.rb:78:in `block in run'
/Users/admin/.rvm/gems/ruby-1.9.3-p551/gems/rake-10.4.2/lib/rake/application.rb:176:in `standard_exception_handling'
/Users/admin/.rvm/gems/ruby-1.9.3-p551/gems/rake-10.4.2/lib/rake/application.rb:75:in `run'
/Users/admin/.rvm/gems/ruby-1.9.3-p551/gems/rake-10.4.2/bin/rake:33:in `'
/Users/admin/.rvm/gems/ruby-1.9.3-p551/bin/rake:23:in `load'
/Users/admin/.rvm/gems/ruby-1.9.3-p551/bin/rake:23:in `'
/Users/admin/.rvm/gems/ruby-1.9.3-p551/bin/ruby_executable_hooks:15:in `eval'
/Users/admin/.rvm/gems/ruby-1.9.3-p551/bin/ruby_executable_hooks:15:in `'

Any help much appreciated.