TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "http://digitalcollections.library.gsu.edu/iiif/2/university:5308/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-9831d4a3-ab03-412d-b621-12a74f16c1b2",
      "cw-2bd882a7-3f61-49be-b429-94dbb3f3c350"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-e4fb0d07-7106-44cd-b15c-0d71c05021e6",
    "manifestId": "http://digitalcollections.library.gsu.edu/iiif/2/university:5308/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-2bd882a7-3f61-49be-b429-94dbb3f3c350",
    "thumbnailNavigationPosition": "none",
    "allowClose": false,
    "loadedManifest": "http://digitalcollections.library.gsu.edu/iiif/2/university:5308/manifest.json",
    "allowFullscreen": true,
    "allowMaximize": false
  }
}