Jenkins CASC for organization folder: Whats wrong?

jenkins.yaml

jobs:
  - script: >
      organizationFolder('gitbucket') {
        description("All repos with Jenkinsfiles discovered on gitbucket")
        displayName("gitbucket")
        organizations {
          github {
            apiUri("http://gitbucket/api/v3")
            credentialsId('DEMO_GIT_CREDS')
            repoOwner('root')
          }
        }
        configure { node ->
          def traits = it / navigators / 'org.jenkinsci.plugins.github__branch__source.GitHubSCMNavigator' / traits
          traits << 'org.jenkinsci.plugins.github_branch_source.BranchDiscoveryTrait' {
              strategyId 1
          }
          traits << 'org.jenkinsci.plugins.github_branch_source.ForkPullRequestDiscoveryTrait' {
              strategyId 2
              trust(class: 'org.jenkinsci.plugins.github_branch_source.ForkPullRequestDiscoveryTrait$TrustEveryone')
          }
          traits << 'org.jenkinsci.plugins.github__branch__source.OriginPullRequestDiscoveryTrait' {
              strategyId 2
          }
        }
      }