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-78a7ae52-9935-405a-8e6c-03e178c4dd0f",
      "cw-3f3da387-c253-4408-b0cb-21103a84c1e5"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-63c4f6f0-7cfd-449b-9dff-b67ba81021f9",
    "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-3f3da387-c253-4408-b0cb-21103a84c1e5"
  }
}