CircularDependencyError

[vnijat93]

Let me know if this is not the right place to ask this question.

When installing Travis CLI on my Mac using gem install travis, I'm getting CircularDependencyError:

ERROR: While executing gem ... (Gem::Resolver::Molinillo::CircularDependencyError)
There is a circular dependency between faraday-net_http_persistent and faraday

[dove-young]

I tried gem install travis on my Mac and got 404 not found error

gem install travis                                                                                                                          2
ERROR:  Could not find a valid gem 'travis' (>= 0), here is why:
          Unable to download data from https://gems.ruby-china.org/ - bad response Not Found 404 (https://gems.ruby-china.org/specs.4.8.gz)

[dove-young]

I tried sudo gem install travis --source 'https://rubygems.org/' command. It installed travis but still display at the end of installation

Installing ri documentation for travis-1.10.0
Done installing documentation for websocket, pusher-client, public_suffix, addressable, launchy, json_pure, highline, net-http-pipeline, net-http-persistent, multi_json, ruby2_keywords, multipart-post, faraday-net_http_persistent, faraday-net_http, faraday-excon, faraday-em_synchrony, faraday-em_http, faraday, faraday_middleware, thread_safe, tzinfo, concurrent-ruby, i18n, activesupport, gh, travis after 15 seconds
WARNING:  Unable to pull data from 'https://gems.ruby-china.org/': bad response Not Found 404 (https://gems.ruby-china.org/specs.4.8.gz)
26 gems installed