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/p16022coll205/245/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-7dc18b91-02a7-4626-951f-5bf75d1017f3",
      "cw-60005624-7611-4297-a4ee-aa8bb47df90f"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-ac3235af-a789-464e-ad60-d6f3dec03c76",
    "manifestId": "https://cdm16022.contentdm.oclc.org/iiif/info/p16022coll205/245/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-60005624-7611-4297-a4ee-aa8bb47df90f"
  }
}