Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://iiif.archive.org/iiif/naeb-b111-f08-15/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-54c05299-06df-4c48-8b46-44a92726c4ef",
      "cw-44e94823-a998-47f7-9633-7eb4e9542f0e"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-4835faa2-f639-48b8-bc60-3dc69b9bcf64",
    "manifestId": "https://iiif.archive.org/iiif/naeb-b111-f08-15/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-44e94823-a998-47f7-9633-7eb4e9542f0e",
    "thumbnailNavigationPosition": "off",
    "loadedManifest": "https://iiif.archive.org/iiif/naeb-b111-f08-15/manifest.json",
    "view": "single",
    "canvasIndex": 0
  }
}