TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "http://cdm17413.contentdm.oclc.org/iiif/2/p17413coll1:721/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-0f67e784-4a0e-4db6-84d0-f8fac93f7a2f",
      "cw-72737d7c-fae5-46e4-b2e4-7be403e10443"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-0cbba944-9b44-42ae-b35f-0585af06af8c",
    "manifestId": "http://cdm17413.contentdm.oclc.org/iiif/2/p17413coll1:721/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-72737d7c-fae5-46e4-b2e4-7be403e10443",
    "thumbnailNavigationPosition": "none",
    "allowClose": false,
    "loadedManifest": "http://cdm17413.contentdm.oclc.org/iiif/2/p17413coll1:721/manifest.json",
    "allowFullscreen": true,
    "allowMaximize": false
  }
}