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/p16022coll230/2067/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-b2e8dd7c-d1e1-420d-a195-d9aa53821f7d",
      "cw-e093b0ab-a31d-4941-9b3d-f06992641fc6"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-b36c1b13-669a-4b02-8c7a-a729db4ec470",
    "manifestId": "https://cdm16022.contentdm.oclc.org/iiif/info/p16022coll230/2067/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-e093b0ab-a31d-4941-9b3d-f06992641fc6"
  }
}