I created a packackage manifest and dummy view and when I try to add content I get this error:

Authorization error: Unauthorized access to URL: /App_Plugins/Grid/LandingHighlightBuilder/LandingHighlightBuilder.view.cshtml

{
  "gridEditors":
  [
    {
      "name": "Landing Highlight Builder",
      "alias": "landingHighlightBuilder",
      "view": "/App_Plugins/Grid/LandingHighlightBuilder/LandingHighlightBuilder.view.cshtml",
      "icon": "icon-picture",
      // "render": "/App_Plugins/Grid/LandingHighlightBuilder/LandingHighlightBuilder.render.cshtml"
    }
  ]
}

My view.cshtml (dummy file just to see what it looks like):

< textarea> Text here... < / textarea>