TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "http://cdm17413.contentdm.oclc.org/iiif/2/troupcomins:2/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-88b0c56f-f6ae-471b-ba72-2eb3ce7c7dc1",
      "cw-6b68be2a-a6ba-4dc7-ad4a-3d1c2e5d9b99"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-7296ecd5-576f-4d19-a970-e250bb74454e",
    "manifestId": "http://cdm17413.contentdm.oclc.org/iiif/2/troupcomins:2/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-6b68be2a-a6ba-4dc7-ad4a-3d1c2e5d9b99",
    "thumbnailNavigationPosition": "none",
    "allowClose": false,
    "loadedManifest": "http://cdm17413.contentdm.oclc.org/iiif/2/troupcomins:2/manifest.json",
    "allowFullscreen": true,
    "allowMaximize": false
  }
}