TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://digitalcollections.library.gsu.edu/iiif/2/university:1214/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-8a1e2d25-31dd-408c-84cd-677ebe3e1b9f",
      "cw-ab2042c2-32a6-4407-bd62-42c8b6d91af1"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-6f77c0af-20e2-4064-8725-84f7026a0265",
    "manifestId": "https://digitalcollections.library.gsu.edu/iiif/2/university:1214/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-ab2042c2-32a6-4407-bd62-42c8b6d91af1",
    "thumbnailNavigationPosition": "none",
    "allowClose": false,
    "loadedManifest": "https://digitalcollections.library.gsu.edu/iiif/2/university:1214/manifest.json",
    "allowFullscreen": true,
    "allowMaximize": false
  }
}