{
"source": [
  {
    "id": "bootplate-moonstone-ActivityPanels",
    "files": [
      {
        "url": "templates/bootplate-moonstone.zip",
        "alternateUrl": "http://nebula.lgsvl.com/templates/bootplate-moonstone.zip",
        "prefixToRemove": "bootplate"
      },
      {
        "url": "webos-app-config.zip",
        "alternateUrl": "http://enyojs.com/webos/webos-app-config.zip"
      },
      {
        "url": "templates/template-ActivityPanels.zip",
        "alternateUrl": "http://nebula.lgsvl.com/templates/template-ActivityPanels.zip"
      }
    ],
    "description": "Moonstone ActivityPanels"
  }
]
}

{
"source": [
  {
    "id": "bootplate-moonstone-ActivityPanels",
    "files": [
      {
        "url": "templates/bootplate-moonstone.zip",
        "alternateUrl": "http://nebula.lgsvl.com/enyojs/templates/bootplate-moonstone.zip",
        "prefixToRemove": "bootplate"
      },
      {
        "url": "webos-app-config.zip",
        "alternateUrl": "http://enyojs.com/webos/webos-app-config.zip"
      },
      {
        "url": "templates/template-ActivityPanels.zip",
        "alternateUrl": "http://nebula.lgsvl.com/enyojs/templates/template-ActivityPanels.zip"
      }
    ],
    "description": "Moonstone ActivityPanels"
  }
]
}

Fix template URLs on Nebula
Fix template URLs on Nebula

alternateURL entries were missing part of the path (specifically the "enyojs/" part).