Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://mediacommons.unl.edu/luna/servlet/iiif/m/RUMSEY~8~1~317897~90086918/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-a1b3615c-0752-43b8-99ed-0b8b5a244358",
      "cw-9cac8311-f72d-42ff-b7e0-2ece17307769"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-edf46c03-b57c-4676-a981-c460a44da154",
    "manifestId": "https://mediacommons.unl.edu/luna/servlet/iiif/m/RUMSEY~8~1~317897~90086918/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-9cac8311-f72d-42ff-b7e0-2ece17307769"
  }
}