TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "http://cdm17413.contentdm.oclc.org/iiif/2/imagecoll:2123/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-2dd4981f-452e-4868-9729-8994c1a06e12",
      "cw-aae24449-92f2-4249-a1d7-82b24348a636"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-6f540e9d-8c0b-4341-bd46-6f3f9614980e",
    "manifestId": "http://cdm17413.contentdm.oclc.org/iiif/2/imagecoll:2123/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-aae24449-92f2-4249-a1d7-82b24348a636",
    "thumbnailNavigationPosition": "none",
    "allowClose": false,
    "loadedManifest": "http://cdm17413.contentdm.oclc.org/iiif/2/imagecoll:2123/manifest.json",
    "allowFullscreen": true,
    "allowMaximize": false
  }
}