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/p16022coll205/682/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-146ec76d-93ff-4ca6-bec8-2ee18ddcccca",
      "cw-b9566116-1e0a-481f-a470-8f253b4f39b9"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-74a7b558-40a8-4412-9f2a-380fe4a9908d",
    "manifestId": "https://cdm16022.contentdm.oclc.org/iiif/info/p16022coll205/682/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-b9566116-1e0a-481f-a470-8f253b4f39b9"
  }
}