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/p16022coll205/286/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-e663544d-552d-4338-b50c-6f593a2754bf",
      "cw-b2bfb32b-4222-4eb6-b51b-684206128fcc"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-7812bb4b-3d24-41b5-952e-2c7732137d1f",
    "manifestId": "https://cdm16022.contentdm.oclc.org/iiif/info/p16022coll205/286/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-b2bfb32b-4222-4eb6-b51b-684206128fcc"
  }
}