TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://digitalcollections.library.gsu.edu/iiif/2/university:211/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-15df4995-5626-4b25-9a58-9535a71031a9",
      "cw-5433bf86-4bd3-4a30-af70-b45b2e80dc51"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-9e89b2ec-1e1e-447f-b75f-f1b6c980af6d",
    "manifestId": "https://digitalcollections.library.gsu.edu/iiif/2/university:211/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-5433bf86-4bd3-4a30-af70-b45b2e80dc51",
    "thumbnailNavigationPosition": "none",
    "allowClose": false,
    "loadedManifest": "https://digitalcollections.library.gsu.edu/iiif/2/university:211/manifest.json",
    "allowFullscreen": true,
    "allowMaximize": false
  }
}