Mirador viewer

TypeError: Failed to fetch

{
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    "error": "TypeError: Failed to fetch",
    "id": "https://digital.libraries.psu.edu/iiif/info/maps1/8869/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
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    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-18d078a2-a14e-4520-92c9-388acb241810",
    "manifestId": "https://digital.libraries.psu.edu/iiif/info/maps1/8869/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-d7ae8913-33a7-4d6a-8fb3-5e3f062d4fd4"
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