Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://digital.libraries.psu.edu/iiif/info/maps1/27655/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-6e21df24-6500-416c-ba20-c150a0a9efa5",
      "cw-981accb3-96b5-48c9-a5a6-c527b0fcdf65"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-1b940d89-4147-450d-8866-26999d986e88",
    "manifestId": "https://digital.libraries.psu.edu/iiif/info/maps1/27655/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-981accb3-96b5-48c9-a5a6-c527b0fcdf65"
  }
}