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/p16022coll289/3/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-4a8e3d23-4084-4244-8e8a-a8133652961f",
      "cw-1a1fca3d-0d73-46eb-b854-c1f04e153f82"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-8b529671-536e-4208-b1b8-fe47930dbe55",
    "manifestId": "https://cdm16022.contentdm.oclc.org/iiif/info/p16022coll289/3/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-1a1fca3d-0d73-46eb-b854-c1f04e153f82"
  }
}