TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "http://digitalcollections.library.gsu.edu/iiif/2/university:3657/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-b9afcac3-36d1-44de-bcb2-8ca34efb67df",
      "cw-c94b9d2f-a8d5-4fa2-8f15-9ecc5b571e99"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-28697c9d-7d17-4d8f-8ba7-16950c551b15",
    "manifestId": "http://digitalcollections.library.gsu.edu/iiif/2/university:3657/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-c94b9d2f-a8d5-4fa2-8f15-9ecc5b571e99",
    "thumbnailNavigationPosition": "none",
    "allowClose": false,
    "loadedManifest": "http://digitalcollections.library.gsu.edu/iiif/2/university:3657/manifest.json",
    "allowFullscreen": true,
    "allowMaximize": false
  }
}