Mirador viewer

SyntaxError: Unexpected token '<', "<!DOCTYPE "... is not valid JSON

{
  "manifest": {
    "error": "SyntaxError: Unexpected token '<', \"<!DOCTYPE \"... is not valid JSON",
    "id": "https://cdm16022.contentdm.oclc.org/iiif/info/p16022coll230/682/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-a72d6b05-2df7-4181-ac56-a2111ff9f4d9",
      "cw-d994ed8c-4843-4af1-a9cf-986c16ae3cd8"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-7519009f-4320-4cf2-bbba-08c4ce44f4e9",
    "manifestId": "https://cdm16022.contentdm.oclc.org/iiif/info/p16022coll230/682/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-d994ed8c-4843-4af1-a9cf-986c16ae3cd8"
  }
}