TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "http://cdm17413.contentdm.oclc.org/iiif/2/imagecoll:6782/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-1fb131c0-a67d-48d5-842a-3e1509882ccf",
      "cw-32e86feb-0473-48f6-976b-b0e901ba79c6"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-b9711c1d-3ee4-4de1-8159-863437447cd2",
    "manifestId": "http://cdm17413.contentdm.oclc.org/iiif/2/imagecoll:6782/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-32e86feb-0473-48f6-976b-b0e901ba79c6",
    "thumbnailNavigationPosition": "none",
    "allowClose": false,
    "loadedManifest": "http://cdm17413.contentdm.oclc.org/iiif/2/imagecoll:6782/manifest.json",
    "allowFullscreen": true,
    "allowMaximize": false
  }
}