TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "http://cdm17413.contentdm.oclc.org/iiif/2/p17413coll1:766/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-06bd864e-17d1-4196-9b3b-afd12f7080fb",
      "cw-6f9234aa-93c2-411f-8f52-9c7ff3c243f1"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-e2c3352d-e929-47bb-8e80-a1a6019ee1fd",
    "manifestId": "http://cdm17413.contentdm.oclc.org/iiif/2/p17413coll1:766/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-6f9234aa-93c2-411f-8f52-9c7ff3c243f1",
    "thumbnailNavigationPosition": "none",
    "allowClose": false,
    "loadedManifest": "http://cdm17413.contentdm.oclc.org/iiif/2/p17413coll1:766/manifest.json",
    "allowFullscreen": true,
    "allowMaximize": false
  }
}