Mirador viewer

TypeError: Failed to fetch
{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://iiif.archive.org/iiif/naeb-b020-f03/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-643280c5-1de1-4bf9-9f67-e168055211be",
      "cw-b2490f32-23c5-4a20-9ee6-6ab836207352"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-25d022a4-888a-4aab-8f32-27f3cbf74cff",
    "manifestId": "https://iiif.archive.org/iiif/naeb-b020-f03/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-b2490f32-23c5-4a20-9ee6-6ab836207352",
    "thumbnailNavigationPosition": "off",
    "loadedManifest": "https://iiif.archive.org/iiif/naeb-b020-f03/manifest.json",
    "view": "single",
    "canvasIndex": 0
  }
}