Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://sandbox.zenodo.org/api/iiif/record:15139/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://sandbox.zenodo.org/api/iiif/record:15139/canvas/C63-AMG-winter-Mercedes-Benz-1725779-wallhere.com.png",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-26d81a0d-c9ef-41a5-bc16-0a6a81987ad3",
      "cw-2c0d4d54-0430-4cac-9a30-f7c3414b23ed"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": true,
    "id": "window-c9a20859-8f1c-4eca-9271-078de4130de8",
    "manifestId": "https://sandbox.zenodo.org/api/iiif/record:15139/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-2c0d4d54-0430-4cac-9a30-f7c3414b23ed",
    "thumbnailNavigationPosition": "far-right",
    "visibleCanvases": []
  }
}