TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "http://cdm17413.contentdm.oclc.org/iiif/2/imagecoll:7466/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-1873f0f7-3132-4d59-9ea4-609e0f367c81",
      "cw-7aadc2bf-d4dc-4e97-ba3e-e79ea1ec46da"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-4434736d-4b1d-4fa5-b2ca-1962141dbbb0",
    "manifestId": "http://cdm17413.contentdm.oclc.org/iiif/2/imagecoll:7466/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-7aadc2bf-d4dc-4e97-ba3e-e79ea1ec46da",
    "thumbnailNavigationPosition": "none",
    "allowClose": false,
    "loadedManifest": "http://cdm17413.contentdm.oclc.org/iiif/2/imagecoll:7466/manifest.json",
    "allowFullscreen": true,
    "allowMaximize": false
  }
}