organizationFolder and githubPush trigger

[Rod Oliver]

I am running Jenkins v2.361.4 with Job DSL plugin v1.81 and GitHub plugin v1.36.0. I am able to setup an organizational folder with JobDSL against my company's GHE instance with the DSL below.

organizationFolder('myorg') {
  displayName('Pipeline development GitHub organisation')
  description('tPipeline development GitHub organisation')
  organizations {
    github {
      repoOwner('myorg')
      apiUri('https://github.example.com/api/v3')
      credentialsId('github-cnd-ci-dev-su')
      traits {
        gitHubBranchDiscovery{
          strategyId(3)
        }
        gitHubPullRequestDiscovery{
          strategyId(3)
        }
        headWildcardFilter {
          excludes('')
          includes('')
        }
      }
    }
  }
}

According to "https://<Jenkins URK>/plugin/job-dsl/api-viewer/index.html#path/organizationFolder-triggers" "githubPush()" is available. However when I update the DSL to that below:

organizationFolder('myorg') {
  displayName('Pipeline development GitHub organisation')
  description('tPipeline development GitHub organisation')
  organizations {
    github {
      repoOwner('myorg')
      apiUri('https://github.example.com/api/v3')
      credentialsId('github-cnd-ci-dev-su')
      traits {
        gitHubBranchDiscovery{
          strategyId(3)
        }
        gitHubPullRequestDiscovery{
          strategyId(3)
        }
        headWildcardFilter {
          excludes('')
          includes('')
        }
      }
    }
  }
  triggers {
    githubPush()
  }  
}

I get an error in Jenkins (which runs the pipeline to execute the JOb DSL script "java.lang.ClassCastException: class jenkins.branch.OrganizationFolder cannot be cast to class hudson.model.Job (jenkins.branch.OrganizationFolder is in unnamed module of loader jenkins.util.URLClassLoader2 @35d00cd9; hudson.model.Job is in unnamed module of loader org.eclipse.jetty.webapp.WebAppClassLoader @4264b240)".

Can anyone suggest a reason for this and a mechanism to trigger an organization scan when there is a push in GitHub?

Rod