Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://iiif.quartexcollections.com/qstarter29/iiif/6befc2af-eddf-4cfc-b6e9-f930c608124a/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-ea390b75-2e08-428d-bb22-f3a0904d4720",
      "cw-a5327e74-586d-4d02-99fc-2a68736d8afa"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-140ba96e-b8e3-4ec4-a422-90dbf8e0c77f",
    "manifestId": "https://iiif.quartexcollections.com/qstarter29/iiif/6befc2af-eddf-4cfc-b6e9-f930c608124a/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-a5327e74-586d-4d02-99fc-2a68736d8afa",
    "thumbnailNavigationPosition": "far-bottom"
  }
}