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/p16022coll289/16/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-b28e1e3c-f9cf-4c95-a8d3-cc50e88cc3d7",
      "cw-10de6150-05f4-463c-8e9e-909fd85716ee"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-2bd257ec-7e16-43e9-bf5a-e55ce0bab060",
    "manifestId": "https://cdm16022.contentdm.oclc.org/iiif/info/p16022coll289/16/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-10de6150-05f4-463c-8e9e-909fd85716ee"
  }
}