Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://iiif.archivelab.org/iiif/naeb-b020-f05/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-00eb932f-edf1-49c6-b33c-bbd77b3ebf0e",
      "cw-9232df71-3794-4f86-9451-377408f481b7"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-6ee82818-3b71-4400-836b-9610e1a2dc4b",
    "manifestId": "https://iiif.archivelab.org/iiif/naeb-b020-f05/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-9232df71-3794-4f86-9451-377408f481b7",
    "thumbnailNavigationPosition": "off",
    "loadedManifest": "https://iiif.archivelab.org/iiif/naeb-b020-f05/manifest.json",
    "view": "single",
    "canvasIndex": 0
  }
}