TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://digitalcollections.library.gsu.edu/iiif/2/university:535/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-9b24c4a1-c005-4568-81ef-e1359e008428",
      "cw-94f049e2-334a-464e-bd9c-6bb68e8ae19b"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-a3cf419c-7433-41b8-8863-df9c94dd3476",
    "manifestId": "https://digitalcollections.library.gsu.edu/iiif/2/university:535/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-94f049e2-334a-464e-bd9c-6bb68e8ae19b",
    "thumbnailNavigationPosition": "none",
    "allowClose": false,
    "loadedManifest": "https://digitalcollections.library.gsu.edu/iiif/2/university:535/manifest.json",
    "allowFullscreen": true,
    "allowMaximize": false
  }
}