每次我运行gem install something，我都会
Successfully installed bundle-0.0.1
ERROR: While executing gem ... (NoMethodError)
undefined method `source_paths' for #<Gem::Specification:0x6ab2aec bundle-0.0.1>
我尝试重新安装gem，尝试重新安装bundle / bundler - 没有帮助。当我尝试rails new blog时，我得到了
An error occurred while installing sqlite3 (1.3.13), and Bundler cannot
continue.
Make sure that `gem install sqlite3 -v '1.3.13'` succeeds before bundling.
In Gemfile:
sqlite3
run bundle exec spring binstub --all
Could not find gem 'sqlite3' in any of the gem sources listed in your Gemfile.
我该怎么做才能解决这个问题？