TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://cdm17323.contentdm.oclc.org/iiif/2/p17323coll7:821/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-3a8d68eb-ae76-4b41-9fd2-8fa23a513580",
      "cw-af4ae21d-7065-4109-a710-cd649930a1b1"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-f5259f97-75a4-4bf1-9733-ebeaa434167e",
    "manifestId": "https://cdm17323.contentdm.oclc.org/iiif/2/p17323coll7:821/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-af4ae21d-7065-4109-a710-cd649930a1b1",
    "thumbnailNavigationPosition": "none",
    "allowClose": false,
    "loadedManifest": "https://cdm17323.contentdm.oclc.org/iiif/2/p17323coll7:821/manifest.json",
    "allowFullscreen": true,
    "allowMaximize": false
  }
}