Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://iiif.quartexcollections.com/pem/iiif/54c1ed83-ace4-4e43-b5b8-7590968ff9eb/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-639c2463-3399-4626-af18-273b4cf5be1c",
      "cw-5f55aab3-6a0a-4b88-a1a8-d0f6f563369e"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-2f32e020-d06b-47c2-b77c-390e17c7a119",
    "manifestId": "https://iiif.quartexcollections.com/pem/iiif/54c1ed83-ace4-4e43-b5b8-7590968ff9eb/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-5f55aab3-6a0a-4b88-a1a8-d0f6f563369e",
    "thumbnailNavigationPosition": "far-bottom"
  }
}