Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://sandbox.zenodo.org/api/iiif/record:185474/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://sandbox.zenodo.org/api/iiif/record:185474/canvas/Psychotherapist%20Services.jpg",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-4de064d5-15a7-4bc3-a4a3-8d2cc02b120c",
      "cw-7933ae9b-109e-4d32-b822-2b56cbcd8139"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": true,
    "id": "window-6c16b170-2840-413c-8def-e2a06e0f75a4",
    "manifestId": "https://sandbox.zenodo.org/api/iiif/record:185474/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-7933ae9b-109e-4d32-b822-2b56cbcd8139",
    "thumbnailNavigationPosition": "far-right",
    "visibleCanvases": []
  }
}