Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://iiif.quartexcollections.com/hcpl/iiif/f6785521-4a7c-4321-822e-5aaac3660dc8/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-0b7a3357-68f0-4771-a30d-3c0e1cfec581",
      "cw-e60199af-49f3-4012-ab2d-7f4d67f88a7b"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-02e1906b-ab9c-48c3-b39b-8f082ce0f109",
    "manifestId": "https://iiif.quartexcollections.com/hcpl/iiif/f6785521-4a7c-4321-822e-5aaac3660dc8/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-e60199af-49f3-4012-ab2d-7f4d67f88a7b",
    "thumbnailNavigationPosition": "far-bottom"
  }
}