コントローラとアクション設定時のエラー？

rails g controller home topを入力したところ、このような文がでできました。

terminal
1rails g controller home top
2Ignoring bindex-0.7.0 because its extensions are not built.  Try: gem pristine bindex --version 0.7.0
3Ignoring bootsnap-1.4.4 because its extensions are not built.  Try: gem pristine bootsnap --version 1.4.4
4Ignoring byebug-11.0.1 because its extensions are not built.  Try: gem pristine byebug --version 11.0.1
5Ignoring childprocess-1.0.1 because its extensions are not built.  Try: gem pristine childprocess --version 1.0.1
6/Library/Ruby/Gems/2.3.0/gems/bundler-2.0.2/lib/bundler/spec_set.rb:87:in `block in materialize': Could not find nokogiri-1.10.3 in any of the sources (Bundler::GemNotFound)
7	from /Library/Ruby/Gems/2.3.0/gems/bundler-2.0.2/lib/bundler/spec_set.rb:81:in `map!'
8	from /Library/Ruby/Gems/2.3.0/gems/bundler-2.0.2/lib/bundler/spec_set.rb:81:in `materialize'
9	from /Library/Ruby/Gems/2.3.0/gems/bundler-2.0.2/lib/bundler/definition.rb:170:in `specs'
10	from /Library/Ruby/Gems/2.3.0/gems/bundler-2.0.2/lib/bundler/definition.rb:237:in `specs_for'
11	from /Library/Ruby/Gems/2.3.0/gems/bundler-2.0.2/lib/bundler/definition.rb:226:in `requested_specs'
12	from /Library/Ruby/Gems/2.3.0/gems/bundler-2.0.2/lib/bundler/runtime.rb:108:in `block in definition_method'
13	from /Library/Ruby/Gems/2.3.0/gems/bundler-2.0.2/lib/bundler/runtime.rb:20:in `setup'
14	from /Library/Ruby/Gems/2.3.0/gems/bundler-2.0.2/lib/bundler.rb:107:in `setup'
15	from /Library/Ruby/Gems/2.3.0/gems/bundler-2.0.2/lib/bundler/setup.rb:20:in `<top (required)>'
16	from /Users/kaitomizukami/.rbenv/versions/2.3.7/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
17	from /Users/kaitomizukami/.rbenv/versions/2.3.7/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
18	from /Library/Ruby/Gems/2.3.0/gems/spring-2.0.2/lib/spring/commands.rb:33:in `<module:Spring>'
19	from /Library/Ruby/Gems/2.3.0/gems/spring-2.0.2/lib/spring/commands.rb:4:in `<top (required)>'
20	from /Users/kaitomizukami/.rbenv/versions/2.3.7/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
21	from /Users/kaitomizukami/.rbenv/versions/2.3.7/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
22	from /Library/Ruby/Gems/2.3.0/gems/spring-2.0.2/lib/spring/server.rb:9:in `<top (required)>'
23	from /Users/kaitomizukami/.rbenv/versions/2.3.7/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
24	from /Users/kaitomizukami/.rbenv/versions/2.3.7/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
25	from /Library/Ruby/Gems/2.3.0/gems/spring-2.0.2/lib/spring/client/server.rb:9:in `call'
26	from /Library/Ruby/Gems/2.3.0/gems/spring-2.0.2/lib/spring/client/command.rb:7:in `call'
27	from /Library/Ruby/Gems/2.3.0/gems/spring-2.0.2/lib/spring/client.rb:30:in `run'
28	from /Library/Ruby/Gems/2.3.0/gems/spring-2.0.2/bin/spring:49:in `<main>'