undefined method `name' for "default":String

 Rendered compute_resources_vms/show.html.erb within layouts/application (7.0ms)
Completed 500 Internal Server Error in 679ms

ActionView::Template::Error (undefined method `name' for "default":String):
    14:     <%= prop :root_device_type %>
    15:     <%= prop :image_id %>
    16:     <%= prop :flavor_id %>
    17:     <%= prop :groups, "Security Groups" %>
    18:   </table>
    19: </div>
  app/helpers/compute_resources_vms_helper.rb:13:in `block (3 levels) in prop'
  app/helpers/compute_resources_vms_helper.rb:13:in `map'
  app/helpers/compute_resources_vms_helper.rb:13:in `block (2 levels) in prop'
  app/helpers/compute_resources_vms_helper.rb:9:in `block in prop'
  app/helpers/compute_resources_vms_helper.rb:5:in `prop'
  app/views/compute_resources_vms/show/_ec2.html.erb:17:in `_app_views_compute_resources_vms_show__ec__html_erb__1708560954665039569_97118100'
  app/views/compute_resources_vms/show.html.erb:2:in `_app_views_compute_resources_vms_show_html_erb__1279964606266932874_96920740'
  app/controllers/compute_resources_vms_controller.rb:44:in `show'