TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://digitalcollections.library.gsu.edu/iiif/2/university:923/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-81e59c2d-a777-4660-87fc-e2d20a2c6869",
      "cw-8f4c5720-dd7e-4638-892d-b74f16c22028"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-07335ff3-0cc8-47c1-81f2-cbad7df1486b",
    "manifestId": "https://digitalcollections.library.gsu.edu/iiif/2/university:923/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-8f4c5720-dd7e-4638-892d-b74f16c22028",
    "thumbnailNavigationPosition": "none",
    "allowClose": false,
    "loadedManifest": "https://digitalcollections.library.gsu.edu/iiif/2/university:923/manifest.json",
    "allowFullscreen": true,
    "allowMaximize": false
  }
}