Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://iiif.quartexcollections.com/qstarter29/iiif/961f7739-adbf-42cd-b022-aad0a5dde844/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-3e78aadd-2f93-453e-b77c-5ef928ef339f",
      "cw-11cd97f6-eb85-45f9-80bd-6dfb2b558074"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-b164cf91-c3bf-4703-9803-3059aa5cc41a",
    "manifestId": "https://iiif.quartexcollections.com/qstarter29/iiif/961f7739-adbf-42cd-b022-aad0a5dde844/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-11cd97f6-eb85-45f9-80bd-6dfb2b558074",
    "thumbnailNavigationPosition": "far-bottom"
  }
}