showAlert error translation does'nt work

Used Zammad version: 6.3.1

installation type: source Operating system:

Browser + version: google chrome 126.0.6478.127

this is not working

      @ajax({
      id: '###',
      type: 'PUT',
      url: "#{@apiPath}###/#{@data.id}",
      data: JSON.stringify(params),
      processData: true,
      success: (data) =>
        @close()
        @successCallback()
      error: (data) =>
        @showAlert(App.i18n.translateContent(data.responseJSON.error_human))
      })

Expected behavior:

• translate error message

Actual behavior:

• error message is not translated