TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "http://cdm17413.contentdm.oclc.org/iiif/2/imagecoll:12150/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-be742884-dcb9-4706-babf-8dc53d13bf99",
      "cw-7b6b9cce-e2f5-4ce5-96b2-3f7484c5c8dd"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-bac80a0a-26ed-46de-8a82-72a5c325f6b2",
    "manifestId": "http://cdm17413.contentdm.oclc.org/iiif/2/imagecoll:12150/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-7b6b9cce-e2f5-4ce5-96b2-3f7484c5c8dd",
    "thumbnailNavigationPosition": "none",
    "allowClose": false,
    "loadedManifest": "http://cdm17413.contentdm.oclc.org/iiif/2/imagecoll:12150/manifest.json",
    "allowFullscreen": true,
    "allowMaximize": false
  }
}