uninitialized constant Dry::Validation::Schema::Form (NameError)

[Ysaakue]

/home/isaac/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/bundler/gems/rails-settings-ui-a55f662ff9b5/lib/rails-settings-ui/settings_form_validator.rb:17:in `<module:RailsSettingsUi>': uninitialized constant Dry::Validation::Schema::Form (NameError)
        from /home/isaac/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/bundler/gems/rails-settings-ui-a55f662ff9b5/lib/rails-settings-ui/settings_form_validator.rb:4:in `<top (required)>'
        from /home/isaac/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/bundler/gems/rails-settings-ui-a55f662ff9b5/lib/rails-settings-ui.rb:6:in `<top (required)>'
        from /home/isaac/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/bundler-1.17.3/lib/bundler/runtime.rb:81:in `require'
        from /home/isaac/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/bundler-1.17.3/lib/bundler/runtime.rb:81:in `block (2 levels) in require'
        from /home/isaac/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/bundler-1.17.3/lib/bundler/runtime.rb:76:in `each'
        from /home/isaac/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/bundler-1.17.3/lib/bundler/runtime.rb:76:in `block in require'
        from /home/isaac/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/bundler-1.17.3/lib/bundler/runtime.rb:65:in `each'
        from /home/isaac/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/bundler-1.17.3/lib/bundler/runtime.rb:65:in `require'
        from /home/isaac/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/bundler-1.17.3/lib/bundler.rb:114:in `require'
        from /home/isaac/projetosDGTI/testes/ae/config/application.rb:7:in `<top (required)>'
        from /home/isaac/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/railties-4.2.8/lib/rails/commands/commands_tasks.rb:78:in `require'
        from /home/isaac/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/railties-4.2.8/lib/rails/commands/commands_tasks.rb:78:in `block in server'
        from /home/isaac/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/railties-4.2.8/lib/rails/commands/commands_tasks.rb:75:in `tap'
        from /home/isaac/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/railties-4.2.8/lib/rails/commands/commands_tasks.rb:75:in `server'
        from /home/isaac/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/railties-4.2.8/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
        from /home/isaac/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/railties-4.2.8/lib/rails/commands.rb:17:in `<top (required)>'
        from /home/isaac/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/railties-4.2.8/lib/rails/app_rails_loader.rb:45:in `require'
        from /home/isaac/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/railties-4.2.8/lib/rails/app_rails_loader.rb:45:in `block in exec_app_rails'
        from /home/isaac/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/railties-4.2.8/lib/rails/app_rails_loader.rb:34:in `loop'
        from /home/isaac/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/railties-4.2.8/lib/rails/app_rails_loader.rb:34:in `exec_app_rails'
        from /home/isaac/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/railties-4.2.8/lib/rails/cli.rb:5:in `<top (required)>'
        from /home/isaac/.rbenv/versions/2.3.3/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:127:in `require'
        from /home/isaac/.rbenv/versions/2.3.3/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:127:in `rescue in require'
        from /home/isaac/.rbenv/versions/2.3.3/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:40:in `require'
        from /home/isaac/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/railties-4.2.8/bin/rails:9:in `<top (required)>'
        from /home/isaac/.rbenv/versions/2.3.3/bin/rails:22:in `load'
        from /home/isaac/.rbenv/versions/2.3.3/bin/rails:22:in `<main>'