TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://digitalcollections.library.gsu.edu/iiif/2/university:435/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-a7a6eca4-c9a6-47c6-aef3-91ba4fdabf5b",
      "cw-3410a011-3286-4e71-9c8a-1de46ea1d9bb"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-c4ccbc69-7a5c-4b31-a685-194a5bb15f8f",
    "manifestId": "https://digitalcollections.library.gsu.edu/iiif/2/university:435/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-3410a011-3286-4e71-9c8a-1de46ea1d9bb",
    "thumbnailNavigationPosition": "none",
    "allowClose": false,
    "loadedManifest": "https://digitalcollections.library.gsu.edu/iiif/2/university:435/manifest.json",
    "allowFullscreen": true,
    "allowMaximize": false
  }
}