Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://iiif.quartexcollections.com/imb/iiif/12c9063e-8185-4269-821d-7908adb51c16/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-934180fd-9fd7-4296-b500-c57aa73c87b5",
      "cw-358e85c4-e1ff-415b-8c1c-4b19a563ecdb"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-6ccc8a73-b7bb-45f1-89e8-3ce4a0a05a15",
    "manifestId": "https://iiif.quartexcollections.com/imb/iiif/12c9063e-8185-4269-821d-7908adb51c16/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-358e85c4-e1ff-415b-8c1c-4b19a563ecdb",
    "thumbnailNavigationPosition": "far-bottom"
  }
}