TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://digitalcollections.library.gsu.edu/iiif/2/signal:53863/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-b1ef0a9f-e70b-4d4e-b39e-ff08fb15d7d9",
      "cw-df6e33c3-a05a-46ba-99e5-dca34858aea8"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-a52546f4-e384-4c9e-879f-584e7249a675",
    "manifestId": "https://digitalcollections.library.gsu.edu/iiif/2/signal:53863/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-df6e33c3-a05a-46ba-99e5-dca34858aea8",
    "thumbnailNavigationPosition": "none",
    "allowClose": false,
    "loadedManifest": "https://digitalcollections.library.gsu.edu/iiif/2/signal:53863/manifest.json",
    "allowFullscreen": true,
    "allowMaximize": false
  }
}