Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://sandbox.zenodo.org/api/iiif/record:197869/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://sandbox.zenodo.org/api/iiif/record:197869/canvas/Help-Clinic-Canada.png",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-61b5a011-3076-43ba-a9de-7fbc04c419e8",
      "cw-896098d9-3eba-406e-85d3-447df49ac220"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": true,
    "id": "window-7dc488ea-2288-4fb3-8149-2e9109d01335",
    "manifestId": "https://sandbox.zenodo.org/api/iiif/record:197869/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-896098d9-3eba-406e-85d3-447df49ac220",
    "thumbnailNavigationPosition": "far-right",
    "visibleCanvases": []
  }
}