Redmine

I followed the Installing Guidance.When at the step exec"bundle exec rake generate_secret_token",it throws an exception:Unable to resolve dependency: user requested 'did_you_mean(= 1.4.0)'.And I updated the 'did_you_mean' to v1.4.0.But it dosen't work. Then I tried to remove 'did_you_mean'.The exception will be Unable to resolve dependency: user requested 'etc (= 1.0.0)'.
The exception was thrown at:
20: from C:/Ruby25-x64/bin/rake:31:in `<main>'
19: from C:/Ruby25-x64/lib/ruby/2.5.0/rubygems.rb:304:in `activate_bin_path'
18: from C:/Ruby25-x64/lib/ruby/2.5.0/rubygems.rb:304:in `synchronize'
17: from C:/Ruby25-x64/lib/ruby/2.5.0/rubygems.rb:306:in `block in activate_bin_path'
16: from C:/Ruby25-x64/lib/ruby/2.5.0/rubygems.rb:243:in `finish_resolve'
15: from C:/Ruby25-x64/lib/ruby/2.5.0/rubygems/request_set.rb:397:in `resolve_current'
14: from C:/Ruby25-x64/lib/ruby/2.5.0/rubygems/request_set.rb:385:in `resolve'
13: from C:/Ruby25-x64/lib/ruby/2.5.0/rubygems/resolver.rb:188:in `resolve'
12: from C:/Ruby25-x64/lib/ruby/2.5.0/rubygems/resolver/molinillo/lib/molinillo/resolver.rb:42:in `resolve'
11: from C:/Ruby25-x64/lib/ruby/2.5.0/rubygems/resolver/molinillo/lib/molinillo/resolution.rb:64:in `resolve'
10: from C:/Ruby25-x64/lib/ruby/2.5.0/rubygems/resolver/molinillo/lib/molinillo/resolution.rb:106:in `start_resolution'
9: from C:/Ruby25-x64/lib/ruby/2.5.0/rubygems/resolver/molinillo/lib/molinillo/resolution.rb:165:in `initial_state'
8: from C:/Ruby25-x64/lib/ruby/2.5.0/rubygems/resolver/molinillo/lib/molinillo/delegates/specification_provider.rb:51:in `sort_dependencies'
7: from C:/Ruby25-x64/lib/ruby/2.5.0/rubygems/resolver/molinillo/lib/molinillo/delegates/specification_provider.rb:69:in `with_no_such_dependency_error_handling'
6: from C:/Ruby25-x64/lib/ruby/2.5.0/rubygems/resolver/molinillo/lib/molinillo/delegates/specification_provider.rb:52:in `block in sort_dependencies'
5: from C:/Ruby25-x64/lib/ruby/2.5.0/rubygems/resolver.rb:277:in `sort_dependencies'
4: from C:/Ruby25-x64/lib/ruby/2.5.0/rubygems/resolver.rb:277:in `with_index'
3: from C:/Ruby25-x64/lib/ruby/2.5.0/rubygems/resolver.rb:277:in `sort_by'
2: from C:/Ruby25-x64/lib/ruby/2.5.0/rubygems/resolver.rb:277:in `each'
1: from C:/Ruby25-x64/lib/ruby/2.5.0/rubygems/resolver.rb:283:in `block in sort_dependencies'
C:/Ruby25-x64/lib/ruby/2.5.0/rubygems/resolver.rb:231:in `search_for':