Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://iiif.participatory-archives.ch/SGV_12N_18184/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-8cdf833d-eadd-4dc1-9d50-2ec2ed1f9d00",
      "cw-73337bd4-85c2-4577-bf53-39eec76b48d3"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-2e47b728-daf8-4819-bc99-a88a507f090b",
    "manifestId": "https://iiif.participatory-archives.ch/SGV_12N_18184/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": true,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-73337bd4-85c2-4577-bf53-39eec76b48d3",
    "loadedManifest": "https://iiif.participatory-archives.ch/SGV_12N_18184/manifest.json"
  }
}