TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "http://cdm17413.contentdm.oclc.org/iiif/2/imagecoll:14776/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-8bb7adb2-5ae4-47e6-b8d2-a272ab75b04f",
      "cw-6cdf8b0e-66e7-469a-b77f-47ccebf872fa"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-2cae1838-45bf-4527-9e65-fdad9948e1d5",
    "manifestId": "http://cdm17413.contentdm.oclc.org/iiif/2/imagecoll:14776/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-6cdf8b0e-66e7-469a-b77f-47ccebf872fa",
    "thumbnailNavigationPosition": "none",
    "allowClose": false,
    "loadedManifest": "http://cdm17413.contentdm.oclc.org/iiif/2/imagecoll:14776/manifest.json",
    "allowFullscreen": true,
    "allowMaximize": false
  }
}