Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://sandbox.zenodo.org/api/iiif/record:174004/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://sandbox.zenodo.org/api/iiif/record:174004/canvas/seo-agency-near-me.png",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-a68c4250-ca0c-4915-a0d3-9cc4aac42e3f",
      "cw-1a1fe3fd-43ce-4c10-9c68-60acd934ef18"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": true,
    "id": "window-859bfe0d-a33e-4e39-8ec2-ed1e292fd123",
    "manifestId": "https://sandbox.zenodo.org/api/iiif/record:174004/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-1a1fe3fd-43ce-4c10-9c68-60acd934ef18",
    "thumbnailNavigationPosition": "far-right",
    "visibleCanvases": []
  }
}