Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://iiif.quartexcollections.com/mrspl/iiif/b3f7cd3c-1184-4847-8e71-e7b88ba72e8b/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-618a7800-5ae5-49cc-96ef-0ce32a324121",
      "cw-bccaee7c-ab6e-4b57-b38e-b69fa8737ce8"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-9759a54f-6aeb-4e19-b921-cf332fc13e9c",
    "manifestId": "https://iiif.quartexcollections.com/mrspl/iiif/b3f7cd3c-1184-4847-8e71-e7b88ba72e8b/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-bccaee7c-ab6e-4b57-b38e-b69fa8737ce8",
    "thumbnailNavigationPosition": "far-bottom"
  }
}